internal error: entered unreachable code

[yshui]

Stack trace:

thread 'main' panicked at 'internal error: entered unreachable code', crates/proc_macro_srv/src/abis/abi_1_56/proc_macro/bridge/mod.rs:256:5

stack backtrace:

   0: rust_begin_unwind
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/panicking.rs:498:5
   1: core::panicking::panic_fmt
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/core/src/panicking.rs:106:14
   2: core::panicking::panic
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/core/src/panicking.rs:47:5
   3: <proc_macro_srv::abis::abi_1_56::proc_macro::bridge::api_tags::Method as proc_macro_srv::abis::abi_1_56::proc_macro::bridge::rpc::DecodeMut<S>>::decode
   4: <proc_macro_srv::abis::abi_1_56::proc_macro::bridge::server::Dispatcher<proc_macro_srv::abis::abi_1_56::proc_macro::bridge::server::MarkedTypes<S>> as proc_macro_srv::abis::abi_1_56::proc_macro::bridge::server::DispatcherTrait>::dispatch
   5: <proc_macro_srv::abis::abi_1_56::proc_macro::bridge::closure::Closure<A,R> as core::convert::From<&mut F>>::from::call
   6: proc_macro::bridge::closure::Closure<A,R>::call
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/closure.rs:27:18
   7: proc_macro::bridge::client::TokenStream::into_iter::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:244:25
   8: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::with::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:336:47
   9: proc_macro::bridge::client::BridgeState::with::{{closure}}::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:293:17
  10: proc_macro::bridge::scoped_cell::ScopedCell<T>::replace
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/scoped_cell.rs:75:9
  11: proc_macro::bridge::client::BridgeState::with::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:291:13
  12: std::thread::local::LocalKey<T>::try_with
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/thread/local.rs:399:16
  13: std::thread::local::LocalKey<T>::with
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/thread/local.rs:375:9
  14: proc_macro::bridge::client::BridgeState::with
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:290:9
  15: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::with
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:329:9
  16: proc_macro::bridge::client::TokenStream::into_iter
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:237:17
  17: proc_macro::token_stream::<impl core::iter::traits::collect::IntoIterator for proc_macro::TokenStream>::into_iter
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/lib.rs:293:22
  18: <proc_macro2::imp::TokenStream as core::iter::traits::collect::IntoIterator>::into_iter
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.32/src/wrapper.rs:314:41
  19: proc_macro2::token_stream::<impl core::iter::traits::collect::IntoIterator for proc_macro2::TokenStream>::into_iter
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.32/src/lib.rs:1289:24
  20: syn::buffer::TokenBuffer::inner_new
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.81/src/buffer.rs:53:19
  21: syn::buffer::TokenBuffer::new2
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.81/src/buffer.rs:112:9
  22: <F as syn::parse::Parser>::parse2
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.81/src/parse.rs:1207:19
  23: syn::parse::Parser::parse
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.81/src/parse.rs:1161:9
  24: syn::parse_macro_input::parse
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/syn-1.0.81/src/parse_macro_input.rs:139:5
  25: thiserror_impl::derive_error
             at /home/shui/.cargo/registry/src/github.com-1ecc6299db9ec823/thiserror-impl-1.0.30/src/lib.rs:28:17
  26: core::ops::function::FnOnce::call_once
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/core/src/ops/function.rs:227:5
  27: proc_macro::bridge::client::Client<fn(proc_macro::TokenStream) .> proc_macro::TokenStream>::expand1::run::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:410:40
  28: proc_macro::bridge::client::run_client::{{closure}}::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:377:26
  29: proc_macro::bridge::scoped_cell::ScopedCell<T>::set::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/scoped_cell.rs:80:33
  30: proc_macro::bridge::scoped_cell::ScopedCell<T>::replace
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/scoped_cell.rs:75:9
  31: proc_macro::bridge::scoped_cell::ScopedCell<T>::set
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/scoped_cell.rs:80:9
  32: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:325:35
  33: std::thread::local::LocalKey<T>::try_with
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/thread/local.rs:399:16
  34: std::thread::local::LocalKey<T>::with
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/thread/local.rs:375:9

  35: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter

             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:325:9
  36: proc_macro::bridge::client::run_client::{{closure}}
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:370:9

  37: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/core/src/panic/unwind_safe.rs:271:9
  38: std::panicking::try::do_call
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/panicking.rs:406:40
  39: __rust_try
  40: std::panicking::try
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/panicking.rs:370:19
  41: std::panic::catch_unwind
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/std/src/panic.rs:133:14
  42: proc_macro::bridge::client::run_client
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:369:5
  43: proc_macro::bridge::client::Client<fn(proc_macro::TokenStream) .> proc_macro::TokenStream>::expand1::run
             at /rustc/ad442399756573dccacb314b6bf8079964bcc72a/library/proc_macro/src/bridge/client.rs:410:13

  44: proc_macro_srv::abis::abi_1_56::proc_macro::bridge::server::run_server
  45: proc_macro_srv::abis::abi_1_56::Abi::expand
  46: proc_macro_srv::dylib::Expander::expand
  47: proc_macro_srv::ProcMacroSrv::expand
  48: proc_macro_srv::cli::run
  49: rust_analyzer::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Caused by: https://github.com/yshui/docconfig/blob/0a534db4b3d940fd83e492844a74c6a7f9ba1856/docconfig_derive/src/lib.rs

[pacak]

Which version of rust-analyzer? What do you need to do to trigger the problem?

[lnicola]

CC #10769

[yshui]

@pacak 7366833, i just opened the file in nvim with lsp support.

[robot-head]

Hitting the same bug I think using rust-analyzer version: add6cccd4 2021-11-17 nightly:

thread 'main' panicked at 'internal error: entered unreachable code', crates/proc_macro_srv/src/abis/abi_1_58/proc_macro/bridge/mod.rs:422:1
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::panicking::panic
             at /rustc/59eed8a2aac0230a8b53e89d4e99d55912ba6b35/library/core/src/panicking.rs:50:5
   3: <proc_macro_srv::abis::abi_1_58::proc_macro::bridge::TokenTree<G,P,I,L> as proc_macro_srv::abis::abi_1_58::proc_macro::bridge::rpc::DecodeMut<S>>::decode
   4: <proc_macro_srv::abis::abi_1_58::proc_macro::bridge::server::Dispatcher<proc_macro_srv::abis::abi_1_58::proc_macro::bridge::server::MarkedTypes<S>> as proc_macro_srv::abis::abi_1_58::proc_macro::bridge::server::DispatcherTrait>::dispatch
   5: <proc_macro_srv::abis::abi_1_58::proc_macro::bridge::closure::Closure<A,R> as core::convert::From<&mut F>>::from::call
   6: proc_macro::bridge::closure::Closure<A,R>::call
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/closure.rs:27:18
   7: proc_macro::bridge::client::TokenStream::into_iter::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:244:25
   8: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::with::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:336:47
   9: proc_macro::bridge::client::BridgeState::with::{{closure}}::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:293:17
  10: proc_macro::bridge::scoped_cell::ScopedCell<T>::replace
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/scoped_cell.rs:75:9
  11: proc_macro::bridge::client::BridgeState::with::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:291:13
  12: std::thread::local::LocalKey<T>::try_with
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/thread/local.rs:399:16
  13: std::thread::local::LocalKey<T>::with
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/thread/local.rs:375:9
  14: proc_macro::bridge::client::BridgeState::with
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:290:9
  15: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::with
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:329:9
  16: proc_macro::bridge::client::TokenStream::into_iter
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:237:17
  17: proc_macro::token_stream::<impl core::iter::traits::collect::IntoIterator for proc_macro::TokenStream>::into_iter
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/lib.rs:259:22
  18: <proc_macro2::imp::TokenStream as core::iter::traits::collect::IntoIterator>::into_iter
             at /home/mattstone/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.27/src/wrapper.rs:314:41
  19: proc_macro2::token_stream::<impl core::iter::traits::collect::IntoIterator for proc_macro2::TokenStream>::into_iter
             at /home/mattstone/.cargo/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.27/src/lib.rs:1267:24
  20: const_format_proc_macros::utils::Peekable2<core::ops::range::Range<u8>>::new
             at /home/mattstone/.cargo/registry/src/github.com-1ecc6299db9ec823/const_format_proc_macros-0.2.22/src/utils.rs:37:19
  21: const_format_proc_macros::parse_utils::ParseBuffer::new
             at /home/mattstone/.cargo/registry/src/github.com-1ecc6299db9ec823/const_format_proc_macros-0.2.22/src/parse_utils.rs:18:20
  22: const_format_proc_macros::parse_utils::MyParse::parse_token_stream_1
             at /home/mattstone/.cargo/registry/src/github.com-1ecc6299db9ec823/const_format_proc_macros-0.2.22/src/parse_utils.rs:362:26
  23: const_format_proc_macros::__concatcp_impl
             at /home/mattstone/.cargo/registry/src/github.com-1ecc6299db9ec823/const_format_proc_macros-0.2.22/src/lib.rs:54:5
  24: core::ops::function::FnOnce::call_once
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/core/src/ops/function.rs:227:5
  25: proc_macro::bridge::client::Client<fn(proc_macro::TokenStream) .> proc_macro::TokenStream>::expand1::run::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:410:40
  26: proc_macro::bridge::client::run_client::{{closure}}::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:377:26
  27: proc_macro::bridge::scoped_cell::ScopedCell<T>::set::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/scoped_cell.rs:80:33
  28: proc_macro::bridge::scoped_cell::ScopedCell<T>::replace
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/scoped_cell.rs:75:9
  29: proc_macro::bridge::scoped_cell::ScopedCell<T>::set
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/scoped_cell.rs:80:9
  30: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:325:35
  31: std::thread::local::LocalKey<T>::try_with
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/thread/local.rs:399:16
  32: std::thread::local::LocalKey<T>::with
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/thread/local.rs:375:9
  33: proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:325:9
  34: proc_macro::bridge::client::run_client::{{closure}}
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:370:9
  35: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/core/src/panic/unwind_safe.rs:271:9
  36: std::panicking::try::do_call
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/panicking.rs:406:40
  37: __rust_try
  38: std::panicking::try
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/panicking.rs:370:19
  39: std::panic::catch_unwind
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/std/src/panic.rs:133:14
  40: proc_macro::bridge::client::run_client
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:369:5
  41: proc_macro::bridge::client::Client<fn(proc_macro::TokenStream) .> proc_macro::TokenStream>::expand1::run
             at /rustc/18bc4bee9710b181b440a472635150f0d6257713/library/proc_macro/src/bridge/client.rs:410:13
  42: proc_macro_srv::abis::abi_1_58::proc_macro::bridge::server::run_server
  43: proc_macro_srv::abis::abi_1_58::Abi::expand
  44: proc_macro_srv::dylib::Expander::expand
  45: proc_macro_srv::ProcMacroSrv::expand
  46: proc_macro_srv::cli::run
  47: rust_analyzer::try_main
  48: rust_analyzer::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[twitchax]

+1 here, as well, when using async_trait for me.

[Dessix]

If you're having this, just upgrade your rust toolchain at or past 2021-11-15; it doesn't occur on nightly-2021-11-16 for me.

[twitchax]

Can confirm @Dessix's suggestion addresses the issue.

[yshui]

So a bug in upstream compiler?

[lnicola]

See also #10799.

For a couple of days we picked the 1.58 ABI for 1.57.

[jonas-schievink]

This one should have been fixed by #10799 and shipped in today's last week's release, so closing.

Please let us know if it still occurs on more recent rust-analyzer versions.

[lnicola]

Didn't #10799 ship last week?