[perf] test MCP510 #113382

lqd · 2023-07-05T20:17:41Z

rust-timer · 2023-07-05T23:34:04Z

Finished benchmarking commit (4cb98396e9dc17fbe9b0da2b1bd35d9b05fff30c): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR may lead to changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Warning ⚠: The following benchmark(s) failed to build:

rustc

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-34.1%	[-74.8%, -0.6%]	31
Improvements ✅ (secondary)	-32.7%	[-74.0%, -3.7%]	74
All ❌✅ (primary)	-34.1%	[-74.8%, -0.6%]	31

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	27.8%	[21.9%, 33.7%]	2
Regressions ❌ (secondary)	2.3%	[2.3%, 2.3%]	1
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	27.8%	[21.9%, 33.7%]	2

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-32.3%	[-65.9%, -1.4%]	28
Improvements ✅ (secondary)	-28.4%	[-64.8%, -3.3%]	73
All ❌✅ (primary)	-32.3%	[-65.9%, -1.4%]	28

Binary size

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.6%	[0.6%, 2.4%]	20
Regressions ❌ (secondary)	0.5%	[0.4%, 1.1%]	61
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-0.3%	[-0.4%, -0.1%]	2
All ❌✅ (primary)	1.6%	[0.6%, 2.4%]	20

Bootstrap: missing data

lqd · 2023-07-18T17:42:43Z

The data gathering is done so I'll close this for now, but may reopen to rerun crater on these new try artifacts.

rust-timer · 2025-08-28T17:52:22Z

Finished benchmarking commit (e67815e): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	2.7%	[2.5%, 2.9%]	6
Improvements ✅ (primary)	-0.2%	[-0.6%, -0.1%]	34
Improvements ✅ (secondary)	-0.4%	[-1.0%, -0.1%]	28
All ❌✅ (primary)	-0.2%	[-0.6%, -0.1%]	34

Max RSS (memory usage)

Results (secondary -2.4%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.4%	[-2.4%, -2.4%]	2
All ❌✅ (primary)	-	-	0

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 468.353s -> 467.758s (-0.13%)
Artifact size: 390.65 MiB -> 390.75 MiB (0.03%)

lqd · 2025-08-29T08:22:31Z

note to self about the experiment: "same run to weed out noise from improvements and regressions"

@bors try @rust-timer queue

[perf] test MCP510

rust-bors · 2025-08-29T10:38:53Z

☀️ Try build successful (CI)
Build commit: 11d963f (11d963f1d268b429ef70fafab208d4f32547a0ac, parent: 41f2b6b39e7526a28d50ff6918dda6de48add5e4)

rust-timer · 2025-08-29T11:51:38Z

Finished benchmarking commit (11d963f): comparison URL.

Overall result: ✅ improvements - no action needed

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

@bors rollup=never
@rustbot label: -S-waiting-on-perf -perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	0.5%	[0.5%, 0.5%]	3
Improvements ✅ (primary)	-0.2%	[-0.6%, -0.1%]	42
Improvements ✅ (secondary)	-0.4%	[-1.0%, -0.0%]	34
All ❌✅ (primary)	-0.2%	[-0.6%, -0.1%]	42

Max RSS (memory usage)

This benchmark run did not return any relevant results for this metric.

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 466.755s -> 465.755s (-0.21%)
Artifact size: 388.52 MiB -> 388.54 MiB (0.00%)

lqd · 2025-12-09T14:18:51Z

note to self about the experiment: "lazy construction of the polonius localized constraints, -Zpolonius=next enabled so tests will fail"

@bors try @rust-timer queue

[perf] test MCP510

rust-log-analyzer · 2025-12-09T15:13:22Z

The job aarch64-gnu-llvm-20-1 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)


failures:

---- [ui] tests/ui/drop/dropck-normalize-errors.rs#nll stdout ----
Saved the actual stderr to `/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/drop/dropck-normalize-errors.nll/dropck-normalize-errors.nll.stderr`
diff of stderr:

74 LL | trait NonImplementedTrait {
75    | ^^^^^^^^^^^^^^^^^^^^^^^^^
76 
---
The actual stderr differed from the expected stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args drop/dropck-normalize-errors.rs`

error in revision `nll`: 1 errors occurred comparing output.
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/drop/dropck-normalize-errors.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/drop/dropck-normalize-errors.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
error[E0277]: the trait bound `NonImplementedStruct: NonImplementedTrait` is not satisfied in `ADecoder<'a>`
##[error]  --> /checkout/tests/ui/drop/dropck-normalize-errors.rs:19:28
   |
LL | fn make_a_decoder<'a>() -> ADecoder<'a> {
   |                            ^^^^^^^^^^^^ unsatisfied trait bound
   |
help: within `ADecoder<'a>`, the trait `NonImplementedTrait` is not implemented for `NonImplementedStruct`
  --> /checkout/tests/ui/drop/dropck-normalize-errors.rs:14:1
   |
LL | struct NonImplementedStruct;
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: this trait has no implementations, consider adding one
---
LL | pub struct ADecoder<'a> {
   |            ^^^^^^^^
   = note: the return type of a function must have a statically known size

error[E0277]: the trait bound `NonImplementedStruct: NonImplementedTrait` is not satisfied in `BDecoder`
##[error]  --> /checkout/tests/ui/drop/dropck-normalize-errors.rs:27:20
   |
LL |     type Decoder = BDecoder;
   |                    ^^^^^^^^ unsatisfied trait bound
   |
help: within `BDecoder`, the trait `NonImplementedTrait` is not implemented for `NonImplementedStruct`
  --> /checkout/tests/ui/drop/dropck-normalize-errors.rs:14:1
   |
LL | struct NonImplementedStruct;
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: this trait has no implementations, consider adding one
---

error[E0277]: the trait bound `NonImplementedStruct: NonImplementedTrait` is not satisfied
##[error]  --> /checkout/tests/ui/drop/dropck-normalize-errors.rs:31:22
   |
LL |     non_implemented: <NonImplementedStruct as NonImplementedTrait>::Assoc,
   |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unsatisfied trait bound
   |
help: the trait `NonImplementedTrait` is not implemented for `NonImplementedStruct`
  --> /checkout/tests/ui/drop/dropck-normalize-errors.rs:14:1
   |
---
error in revision `edition2024`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/impl-trait/alias-liveness/rpit-hide-lifetime-for-swap.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "edition2024" "--check-cfg" "cfg(test,FALSE,edition2015,edition2024)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/impl-trait/alias-liveness/rpit-hide-lifetime-for-swap.edition2024" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2024"
stdout: none
stderr: none

---- [ui] tests/ui/impl-trait/alias-liveness/rpit-hide-lifetime-for-swap.rs#edition2024 stdout end ----
---- [ui] tests/ui/impl-trait/hidden-lifetimes.rs#edition2024 stdout ----

error in revision `edition2024`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/impl-trait/hidden-lifetimes.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "edition2024" "--check-cfg" "cfg(test,FALSE,edition2015,edition2024)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/impl-trait/hidden-lifetimes.edition2024" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers" "--edition=2024"
stdout: none
stderr: none

---- [ui] tests/ui/impl-trait/hidden-lifetimes.rs#edition2024 stdout end ----
---- [ui] tests/ui/nll/get_default.rs#nll stdout ----
Saved the actual stderr to `/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/get_default.nll/get_default.nll.stderr`
diff of stderr:

1 error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable
-   --> $DIR/get_default.rs:24:17
-    |
- LL | fn ok(map: &mut Map) -> &String {
-    |            - let's call the lifetime of this reference `'1`
- LL |     loop {
- LL |         match map.get() {
-    |               --- immutable borrow occurs here
- LL |             Some(v) => {
- LL |                 return v;
-    |                        - returning this value requires that `*map` is borrowed for `'1`
- ...
- LL |                 map.set(String::new()); // Ideally, this would not error.
-    |                 ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
- 
- error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable
17   --> $DIR/get_default.rs:35:17
18    |
19 LL | fn err(map: &mut Map) -> &String {

28 LL |                 return v;
29    |                        - returning this value requires that `*map` is borrowed for `'1`
30 
- error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable
-   --> $DIR/get_default.rs:40:17
-    |
- LL | fn err(map: &mut Map) -> &String {
-    |             - let's call the lifetime of this reference `'1`
- LL |     loop {
- LL |         match map.get() {
-    |               --- immutable borrow occurs here
- ...
- LL |                 return v;
-    |                        - returning this value requires that `*map` is borrowed for `'1`
- ...
- LL |                 map.set(String::new()); // Ideally, this would not error.
-    |                 ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
- 
- error: aborting due to 3 previous errors
+ error: aborting due to 1 previous error
47 
48 For more information about this error, try `rustc --explain E0502`.
49 


The actual stderr differed from the expected stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args nll/get_default.rs`

error in revision `nll`: 1 errors occurred comparing output.
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/get_default.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/get_default.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable
##[error]  --> /checkout/tests/ui/nll/get_default.rs:35:17
   |
LL | fn err(map: &mut Map) -> &String {
   |             - let's call the lifetime of this reference `'1`
LL |     loop {
LL |         match map.get() {
   |               --- immutable borrow occurs here
LL |             Some(v) => {
LL |                 map.set(String::new()); // We always expect an error here.
   |                 ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
LL |                 //~^ ERROR borrowed as immutable
LL |                 return v;
   |                        - returning this value requires that `*map` is borrowed for `'1`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0502`.
------------------------------------------

---- [ui] tests/ui/nll/get_default.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/filtering-lending-iterator-issue-92985.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/filtering-lending-iterator-issue-92985.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/filtering-lending-iterator-issue-92985.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/filtering-lending-iterator-issue-92985.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/iterating-updating-mutref.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/iterating-updating-mutref.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/iterating-updating-mutref.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/iterating-updating-mutref.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-112087.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-112087.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-112087.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-112087.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-123839.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-123839.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-123839.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-123839.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-124070.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-124070.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-124070.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-124070.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-124254.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-124254.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-124254.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-124254.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-51526.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-51526.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-51526.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-51526.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-21906.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-21906.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-21906.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-21906.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-51545.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-51545.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-51545.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-51545.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-54663.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-54663.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-54663.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-54663.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-58787.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-58787.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-58787.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-58787.rs#nll stdout end ----
---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-68934.rs#nll stdout ----

error in revision `nll`: ui test did not emit an error
note: by default, ui tests are expected not to compile.
hint: use check-pass, build-pass, or run-pass directive to change this behavior.
status: exit status: 0
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/nll/polonius/nll-problem-case-3-issue-68934.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius,legacy)" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/nll/polonius/nll-problem-case-3-issue-68934.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
stderr: none

---- [ui] tests/ui/nll/polonius/nll-problem-case-3-issue-68934.rs#nll stdout end ----
---- [ui] tests/ui/wf/hir-wf-check-erase-regions.rs#nll stdout ----
Saved the actual stderr to `/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/wf/hir-wf-check-erase-regions.nll/hir-wf-check-erase-regions.nll.stderr`
diff of stderr:

37 note: required by a bound in `Flatten`
38   --> $SRC_DIR/core/src/iter/adapters/flatten.rs:LL:COL
39 
---
The actual stderr differed from the expected stderr
To update references, rerun the tests and pass the `--bless` flag
To only update this specific test, also pass `--test-args wf/hir-wf-check-erase-regions.rs`

error in revision `nll`: 1 errors occurred comparing output.
status: exit status: 1
command: env -u RUSTC_LOG_COLOR RUSTC_ICE="0" RUST_BACKTRACE="short" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/tests/ui/wf/hir-wf-check-erase-regions.rs" "-Zthreads=1" "-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX" "-Ztranslate-remapped-path-to-local-path=no" "-Z" "ignore-directory-in-diagnostics-source-blocks=/cargo" "-Z" "ignore-directory-in-diagnostics-source-blocks=/checkout/vendor" "--sysroot" "/checkout/obj/build/aarch64-unknown-linux-gnu/stage2" "--target=aarch64-unknown-linux-gnu" "--cfg" "nll" "--check-cfg" "cfg(test,FALSE,nll,polonius)" "-C" "incremental=/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/wf/hir-wf-check-erase-regions.nll/hir-wf-check-erase-regions.inc" "-Z" "incremental-verify-ich" "--error-format" "json" "--json" "future-incompat" "-Ccodegen-units=1" "-Zui-testing" "-Zdeduplicate-diagnostics=no" "-Zwrite-long-types-to-disk=no" "-Cstrip=debuginfo" "--emit" "metadata" "-C" "prefer-dynamic" "--out-dir" "/checkout/obj/build/aarch64-unknown-linux-gnu/test/ui/wf/hir-wf-check-erase-regions.nll" "-A" "unused" "-W" "unused_attributes" "-A" "internal_features" "-A" "unused_parens" "-A" "unused_braces" "-Crpath" "-Cdebuginfo=0" "-Lnative=/checkout/obj/build/aarch64-unknown-linux-gnu/native/rust-test-helpers"
stdout: none
--- stderr -------------------------------
error[E0277]: `&'a T` is not an iterator
##[error]  --> /checkout/tests/ui/wf/hir-wf-check-erase-regions.rs:11:21
   |
LL |     type IntoIter = std::iter::Flatten<std::slice::Iter<'a, T>>; //~ ERROR `&'a T` is not an iterator
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `&'a T` is not an iterator
   |
   = help: the trait `Iterator` is not implemented for `&'a T`
help: the trait `Iterator` is implemented for `&mut I`
  --> /rustc/FAKE_PREFIX/library/core/src/iter/traits/iterator.rs:4129:0
   = note: required for `Flatten<std::slice::Iter<'a, T>>` to implement `Iterator`
note: required by a bound in `std::iter::IntoIterator::IntoIter`
  --> /rustc/FAKE_PREFIX/library/core/src/iter/traits/collect.rs:289:4

error[E0277]: `&'a T` is not an iterator
##[error]  --> /checkout/tests/ui/wf/hir-wf-check-erase-regions.rs:11:5
   |
LL |     type IntoIter = std::iter::Flatten<std::slice::Iter<'a, T>>; //~ ERROR `&'a T` is not an iterator
   |     ^^^^^^^^^^^^^ `&'a T` is not an iterator
   |
   = help: the trait `Iterator` is not implemented for `&'a T`
help: the trait `Iterator` is implemented for `&mut I`
  --> /rustc/FAKE_PREFIX/library/core/src/iter/traits/iterator.rs:4129:0
   = note: required for `&'a T` to implement `IntoIterator`
note: required by a bound in `Flatten`
  --> /rustc/FAKE_PREFIX/library/core/src/iter/adapters/flatten.rs:184:0

error[E0277]: `&'a T` is not an iterator
##[error]  --> /checkout/tests/ui/wf/hir-wf-check-erase-regions.rs:15:27
   |
LL |     fn into_iter(self) -> Self::IntoIter {
   |                           ^^^^^^^^^^^^^^ `&'a T` is not an iterator
   |
   = help: the trait `Iterator` is not implemented for `&'a T`
help: the trait `Iterator` is implemented for `&mut I`
  --> /rustc/FAKE_PREFIX/library/core/src/iter/traits/iterator.rs:4129:0
   = note: required for `&'a T` to implement `IntoIterator`

rust-bors · 2025-12-09T16:36:00Z

☀️ Try build successful (CI)
Build commit: 621e94b (621e94b4dbb812275cb66899eed6f57ccd49ea3e, parent: d5525a73009e2c61b09daa69df79064530bd4dcf)

rust-timer · 2025-12-09T17:55:55Z

Finished benchmarking commit (621e94b): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request means it may be perf-sensitive – we'll automatically label it not fit for rolling up. You can override this, but we strongly advise not to, due to possible changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please do so in sufficient writing along with @rustbot label: +perf-regression-triaged. If not, please fix the regressions and do another perf run. If its results are neutral or positive, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

Our most reliable metric. Used to determine the overall result above. However, even this metric can be noisy.

	mean	range	count
Regressions ❌ (primary)	3.0%	[0.2%, 16.2%]	96
Regressions ❌ (secondary)	1.9%	[0.1%, 15.7%]	112
Improvements ✅ (primary)	-0.4%	[-0.6%, -0.2%]	7
Improvements ✅ (secondary)	-0.3%	[-1.0%, -0.0%]	21
All ❌✅ (primary)	2.7%	[-0.6%, 16.2%]	103

Max RSS (memory usage)

Results (primary 11.0%, secondary 5.0%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	12.5%	[0.8%, 29.7%]	9
Regressions ❌ (secondary)	11.4%	[0.7%, 43.3%]	15
Improvements ✅ (primary)	-2.1%	[-2.1%, -2.1%]	1
Improvements ✅ (secondary)	-3.8%	[-7.3%, -1.1%]	11
All ❌✅ (primary)	11.0%	[-2.1%, 29.7%]	10

Cycles

Results (primary 4.5%, secondary 4.9%)

A less reliable metric. May be of interest, but not used to determine the overall result above.

	mean	range	count
Regressions ❌ (primary)	4.9%	[2.1%, 9.2%]	18
Regressions ❌ (secondary)	4.9%	[1.9%, 7.4%]	28
Improvements ✅ (primary)	-2.5%	[-2.5%, -2.5%]	1
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	4.5%	[-2.5%, 9.2%]	19

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 472.272s -> 473.236s (0.20%)
Artifact size: 389.04 MiB -> 386.94 MiB (-0.54%)

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jul 5, 2023

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rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jul 5, 2023

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rustbot removed the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jul 5, 2023

lqd closed this Jul 18, 2023

lqd reopened this Sep 12, 2023

lqd force-pushed the test-mcp510 branch from 793c8e6 to a9e047f Compare September 12, 2023 15:38

rustbot added the T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) label Sep 12, 2023

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lqd force-pushed the test-mcp510 branch from a9e047f to 68e4f7d Compare September 12, 2023 17:25

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lqd force-pushed the test-mcp510 branch from df25e9c to 03e476e Compare September 20, 2023 19:19

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lqd force-pushed the test-mcp510 branch from 03e476e to 5e67656 Compare September 21, 2023 18:31

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rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Aug 28, 2025

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rust-bors bot added a commit that referenced this pull request Aug 29, 2025

Auto merge of #113382 - lqd:test-mcp510, r=<try>

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[perf] test MCP510

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rustbot removed S-waiting-on-perf Status: Waiting on a perf run to be completed. perf-regression Performance regression. labels Aug 29, 2025

lqd force-pushed the test-mcp510 branch from 2cd24b5 to 4fb2d00 Compare December 9, 2025 14:17

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rust-bors bot added a commit that referenced this pull request Dec 9, 2025

Auto merge of #113382 - lqd:test-mcp510, r=<try>

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[perf] test MCP510

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rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Dec 9, 2025

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lqd added 2 commits December 9, 2025 14:29

wip: lazy polonius constraints

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tmp: set polonius=next by default

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lqd force-pushed the test-mcp510 branch from 4fb2d00 to 3febecf Compare December 9, 2025 14:29

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rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Dec 9, 2025

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[perf] test MCP510 #113382

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lqd commented Jul 5, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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rust-timer commented Jul 5, 2023

Overall result: ✅ improvements - no action needed

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lqd commented Jul 18, 2023

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rust-timer commented Aug 28, 2025

Overall result: ❌✅ regressions and improvements - please read the text below

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rust-timer commented Aug 29, 2025

Overall result: ✅ improvements - no action needed

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lqd commented Dec 9, 2025

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rust-timer commented Dec 9, 2025

Overall result: ❌✅ regressions and improvements - please read the text below

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lqd commented Jul 5, 2023 •

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