#[tokio::test] bug in v0.2.826

[gipsyh]

however, "cargo test" is ok.

after upgrade to v0.2.826 has this problem.

[cwfitzgerald]

I can also reproduce this issue with #[wasm_bindgen] saying that RA hit "unreachable code".

[msfjarvis]

Also reproducible with serde's derive macros, I was in the process of creating a minimal repro case before I reported the bug when I saw this issue. The repository is available at https://github.com/msfjarvis/rust-analyzer-serde-repro.

I'm using v0.2.286 of the VSCode plugin and rust-analyzer 7366833 2021-11-20 dev of the rust-analyzer server.

[Veykril]

What rustc version are you using, in case of 1.58-nightly you might want try updating as the early versions of 1.58 have an incompatible proc-macro abi for r-a

[msfjarvis]

What rustc version are you using, in case of 1.58-nightly you might want try updating as the early versions of 1.58 have an incompatible proc-macro abi for r-a

Broken for me on both rustc 1.58.0-nightly (2885c4748 2021-11-20) and rustc 1.58.0-nightly (65f3f8b22 2021-11-21).

[T-parrish]

Having a similar issue (rustc 1.56.1, rust-analyzer v0.2.826):

[wpbrown]

This isn't specific to Tokio. We are seeing this broken pipe err with rustc 1.54 and v0.2.826 - 183ef048f 2021-11-22 stable as well. It's not happening in v0.2.817 - : 73668334f 2021-11-15 stable.

thread 'main' panicked at 'range end index 8 out of range for slice of length 0', crates/proc_macro_srv/src/abis/abi_1_47/proc_macro/bridge/rpc.rs:135:1
stack backtrace:
   0: rust_begin_unwind
             at /rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/std/src/panicking.rs:517:5
   1: core::panicking::panic_fmt
             at /rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/core/src/panicking.rs:101:14
   2: core::slice::index::slice_end_index_len_fail
             at /rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/core/src/slice/index.rs:41:5
   3:  as core::ops::function::FnOnce<()>>::call_once
   4: > as proc_macro_srv::abis::abi_1_47::proc_macro::bridge::server::DispatcherTrait>::dispatch
   5:  as core::convert::From<&mut F>>::from::call
   6: proc_macro::bridge::closure::Closure::call
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/closure.rs:27:18
   7: proc_macro::bridge::client::Literal::integer::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:244:25
   8: proc_macro::bridge::client::::with::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:336:47
   9: proc_macro::bridge::client::BridgeState::with::{{closure}}::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:293:17
  10: proc_macro::bridge::scoped_cell::ScopedCell::replace
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/scoped_cell.rs:75:9
  11: proc_macro::bridge::client::BridgeState::with::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:291:13
  12: std::thread::local::LocalKey::try_with
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/local.rs:400:16
  13: std::thread::local::LocalKey::with
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/local.rs:376:9
  14: proc_macro::bridge::client::BridgeState::with
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:290:9
  15: proc_macro::bridge::client::::with
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:329:9
  16: proc_macro::bridge::client::Literal::integer
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:237:17
  17: proc_macro::Literal::i64_unsuffixed
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/lib.rs:1005:21
  18: proc_macro2::imp::Literal::i64_unsuffixed
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.32/src/wrapper.rs:798:56
  19: proc_macro2::Literal::i64_unsuffixed
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.32/src/lib.rs:1067:41
  20: syn::expr::printing::::to_tokens
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.81/src/expr.rs:3308:27
  21: quote::to_tokens::ToTokens::to_token_stream
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/quote-1.0.10/src/to_tokens.rs:63:9
  22: derive_more::utils::State::field_idents::{{closure}}
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/utils.rs:759:26
  23: core::iter::adapters::map::map_fold::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/iter/adapters/map.rs:82:28
  24: core::iter::traits::iterator::Iterator::fold
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/iter/traits/iterator.rs:2112:21
  25:  as core::iter::traits::iterator::Iterator>::fold
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/iter/adapters/map.rs:122:9
  26: core::iter::traits::iterator::Iterator::for_each
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/iter/traits/iterator.rs:736:9
  27:  as alloc::vec::spec_extend::SpecExtend>::spec_extend
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/vec/spec_extend.rs:40:17
  28:  as alloc::vec::spec_from_iter_nested::SpecFromIterNested>::from_iter
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/vec/spec_from_iter_nested.rs:56:9
  29:  as alloc::vec::spec_from_iter::SpecFromIter>::from_iter
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/vec/spec_from_iter.rs:33:9
  30:  as core::iter::traits::collect::FromIterator>::from_iter
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/alloc/src/vec/mod.rs:2449:9
  31: core::iter::traits::iterator::Iterator::collect
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/iter/traits/iterator.rs:1748:9
  32: derive_more::utils::State::field_idents
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/utils.rs:758:13
  33: derive_more::utils::State::enabled_fields_idents
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/utils.rs:765:9
  34: derive_more::utils::State::enabled_fields_data
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/utils.rs:647:28
  35: derive_more::from::enum_from
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/from.rs:112:32
  36: derive_more::from::expand
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/from.rs:27:12
  37: derive_more::from_derive
             at /home/will/.cargo/registry/src/github.com-1ecc6299db9ec823/derive_more-0.99.16/src/lib.rs:283:29
  38: core::ops::function::FnOnce::call_once
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/core/src/ops/function.rs:227:5
  39: proc_macro::bridge::client::Client proc_macro::TokenStream>::expand1::run::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:410:40
  40: proc_macro::bridge::client::run_client::{{closure}}::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:377:26
  41: proc_macro::bridge::scoped_cell::ScopedCell::set::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/scoped_cell.rs:80:33
  42: proc_macro::bridge::scoped_cell::ScopedCell::replace
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/scoped_cell.rs:75:9
  43: proc_macro::bridge::scoped_cell::ScopedCell::set
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/scoped_cell.rs:80:9
  44: proc_macro::bridge::client::::enter::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:325:35
  45: std::thread::local::LocalKey::try_with
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/local.rs:400:16
  46: std::thread::local::LocalKey::with
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/thread/local.rs:376:9
  47: proc_macro::bridge::client::::enter
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:325:9
  48: proc_macro::bridge::client::run_client::{{closure}}
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:370:9
  49:  as core::ops::function::FnOnce<()>>::call_once
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:347:9
  50: std::panicking::try::do_call
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:401:40
  51: __rust_try
  52: std::panicking::try
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panicking.rs:365:19
  53: std::panic::catch_unwind
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/std/src/panic.rs:434:14
  54: proc_macro::bridge::client::run_client
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:369:5
  55: proc_macro::bridge::client::Client proc_macro::TokenStream>::expand1::run
             at /rustc/a178d0322ce20e33eac124758e837cbd80a6f633/library/proc_macro/src/bridge/client.rs:410:13
  56: proc_macro_srv::abis::abi_1_47::proc_macro::bridge::server::run_server
  57: proc_macro_srv::abis::abi_1_47::Abi::expand
  58: proc_macro_srv::dylib::Expander::expand
  59: proc_macro_srv::ProcMacroSrv::expand
  60: proc_macro_srv::cli::run
  61: rust_analyzer::try_main
  62: rust_analyzer::main

[Veykril]

This is rather odd, given this seems to occur for people on serveral different rustc versions. And for me at least it definitely works on the latest nightly 1.58 as well as stable 1.56.1 which stands in conflict with some of the comments here 😕

[jonas-schievink]

I think this might be the issue? abdb2ac#r61059223 No, this was already fixed

[ivans-tbtl]

Can confirm similar issue with 1.54, as @wpbrown mentioned, 0.2.817 seems to be the last that doesn't crash.

[danielframpton]

I just confirmed locally that the example here fails for me with a local rust-analyzer against rustc 1.54, but starts working if I change crates/proc_macro_srv/src/abis/mod.rs to use the 1.55 abi for rustc 1.54.

Maybe that abi is misnamed; 1.54 has always used the 1.55 abi since its introduction. I suspect that #10799 fixed on of the cases (1.57 vs 1.58) but broke 1.54 by making it use the older 1.47 abi.