Rollup of 6 pull requests

[Centril]

Successful merges:

• Future-proof the Futures API #59119 (Future-proof the Futures API)
• Updated RELEASES.md for 1.34.0 #59599 (Updated RELEASES.md for 1.34.0)
• SGX target: Use linker option to avoid code CGU assignment kludge #59624 (SGX target: Use linker option to avoid code CGU assignment kludge)
• Remove invalid assertion back::link::from add_upstream_rust_crates(). #59696 (Remove invalid assertion back::link::from add_upstream_rust_crates().)
• Add missing tryfrom example #59707 (Add missing tryfrom example)
• wasi: Use shared API for preopened fds #59727 (wasi: Use shared API for preopened fds)

Failed merges:

r? @ghost

[Centril]

@bors r+ p=6

[bors]

📌 Commit 16fff93 has been approved by Centril

[bors]

⌛ Testing commit 16fff93 with merge 317414facf606286f905e329c6185baac875a55e...

[bors]

💔 Test failed - checks-travis

[rust-highfive]

The job x86_64-gnu-tools of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log.

[01:34:45] normalized stderr:
[01:34:45] error[E0308]: mismatched types
[01:34:45]   --> $DIR/async-fn.rs:39:61
[01:34:45]    |
[01:34:45] 39 |     assert_eq!(unsafe { Pin::new_unchecked(&mut fut) }.poll(&waker), Poll::Ready(31));
[01:34:45]    |                                                             ^^^^^^ types differ in mutability
[01:34:45]    = note: expected type `&mut std::task::Context<'_>`
[01:34:45]               found type `&std::task::Waker`
[01:34:45] 
[01:34:45] error: aborting due to previous error
---
[01:34:45] 
[01:34:45] +error[E0308]: mismatched types
[01:34:45] +  --> $DIR/async-fn.rs:39:61
[01:34:45] +   |
[01:34:45] +39 |     assert_eq!(unsafe { Pin::new_unchecked(&mut fut) }.poll(&waker), Poll::Ready(31));
[01:34:45] +   |                                                             ^^^^^^ types differ in mutability
[01:34:45] +   = note: expected type `&mut std::task::Context<'_>`
[01:34:45] +              found type `&std::task::Waker`
[01:34:45] +
[01:34:45] +error: aborting due to previous error
[01:34:45] +error: aborting due to previous error
[01:34:45] +
[01:34:45] +For more information about this error, try `rustc --explain E0308`.
[01:34:45] +
[01:34:45] 
[01:34:45] The actual stderr differed from the expected stderr.
[01:34:45] Actual stderr saved to /tmp/compiletestVvw5QI/async-fn.stderr
[01:34:45] To update references, run this command from build directory:
[01:34:45] tests/run-pass/update-references.sh '/tmp/compiletestVvw5QI' 'async-fn.rs'
[01:34:45] error: 1 errors occurred comparing output.
[01:34:45] status: exit code: 1
[01:34:45] status: exit code: 1
[01:34:45] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-tools-bin/miri" "tests/run-pass/async-fn.rs" "-L" "/tmp/compiletestVvw5QI" "--target=x86_64-unknown-linux-gnu" "--error-format" "json" "-C" "prefer-dynamic" "-o" "/tmp/compiletestVvw5QI/async-fn.stage-id" "-Dwarnings" "-Dunused" "--edition" "2018" "-L" "/tmp/compiletestVvw5QI/async-fn.stage-id.aux" "-A" "unused"
[01:34:45] ------------------------------------------
[01:34:45] 
[01:34:45] ------------------------------------------
[01:34:45] stderr:
[01:34:45] stderr:
[01:34:45] ------------------------------------------
[01:34:45] {"message":"mismatched types","code":{"code":"E0308","explanation":"\nThis error occurs when the compiler was unable to infer the concrete type of a\nvariable. It can occur for several cases, the most common of which is a\nmismatch in the expected type that the compiler inferred for a variable's\ninitializing expression, and the actual type explicitly assigned to the\nvariable.\n\nFor example:\n\n```compile_fail,E0308\nlet x: i32 = \"I am not a number!\";\n//     ~~~   ~~~~~~~~~~~~~~~~~~~~\n//      |             |\n//      |    initializing expression;\n//      |    compiler infers type `&str`\n//      |\n//    type `i32` assigned to variable `x`\n```\n"},"level":"error","spans":[{"file_name":"tests/run-pass/async-fn.rs","byte_start":925,"byte_end":931,"line_start":39,"line_end":39,"column_start":61,"column_end":67,"is_primary":true,"text":[{"text":"    assert_eq!(unsafe { Pin::new_unchecked(&mut fut) }.poll(&waker), Poll::Ready(31));","highlight_start":61,"highlight_end":67}],"label":"types differ in mutability","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"expected type `&mut std::task::Context<'_>`\n   found type `&std::task::Waker`","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"error[E0308]: mismatched types\n  --> tests/run-pass/async-fn.rs:39:61\n   |\n39 |     assert_eq!(unsafe { Pin::new_unchecked(&mut fut) }.poll(&waker), Poll::Ready(31));\n   |                                                             ^^^^^^ types differ in mutability\n   |\n   = note: expected type `&mut std::task::Context<'_>`\n              found type `&std::task::Waker`\n\n"}
[01:34:45] {"message":"For more information about this error, try `rustc --explain E0308`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0308`.\n"}
[01:34:45] 
[01:34:45] ------------------------------------------
[01:34:45] 
---
travis_time:end:002ca29a:start=1554502304395177780,finish=1554502304407462331,duration=12284551
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:194445c0
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:0575ad08
travis_time:start:0575ad08
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:1a4b0cb0
$ dmesg | grep -i kill

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