proc macro server crashed

[Sympatron]

When loading atsamd-rs BSPs, rust-analyzer crashes.
I don't have the VSCode Rust extension installed.

Steps to reproduce:

1. VSCode Version 1.15.1
2. Rust-Analyzer Version 0.2.408
3. git clone https://github.com/atsamd-rs/atsamd.git
4. code atsamd/boards/itsybitsy_m4

settings.json:

{
    "rust-analyzer.procMacro.enable": true,
    "rust-analyzer.cargo.loadOutDirsFromCheck": true,
    "window.zoomLevel": 0,
    "explorer.confirmDragAndDrop": false,
    "workbench.tree.indent": 24,
    "workbench.tree.renderIndentGuides": "always",
    "rust-analyzer.checkOnSave.command": "clippy",
    "files.eol": "\r\n",
    "editor.formatOnSave": true,
    "editor.defaultFormatter": "matklad.rust-analyzer",
    "rust-analyzer.updates.channel": "nightly",
    "rust-analyzer.checkOnSave.allTargets": false,
}

Stack trace:

thread '<unnamed>' panicked at 'no value set for FileTextQuery(FileId(0))', C:\Users\runneradmin\.cargo\registry\src\github.com-1ecc6299db9ec823\salsa-0.16.0\src\input.rs:104:32
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
thread 'main' panicked at 'internal error: entered unreachable code', crates\proc_macro_srv\src\proc_macro\bridge\mod.rs:256:5
stack backtrace:
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
thread 'main' panicked at 'use-after-free in `proc_macro` handle', crates\proc_macro_srv\src\proc_macro\bridge\handle.rs:38:30
stack backtrace:
   0:     0x7ff7015754f9 - <unknown>
   1:     0x7ff70158fcbb - <unknown>
   2:     0x7ff70156e458 - <unknown>
   3:     0x7ff701578544 - <unknown>
   4:     0x7ff701578128 - <unknown>
   5:     0x7ff701578dff - <unknown>
   6:     0x7ff701578965 - <unknown>
   7:     0x7ff701575ddf - <unknown>
   8:     0x7ff701578919 - <unknown>
   9:     0x7ff70158d720 - <unknown>
  10:     0x7ff70158d4c2 - <unknown>
  11:     0x7ff701a6bb5a - <unknown>
  12:     0x7ff7015a4064 - <unknown>
  13:     0x7ff9be21abb7 - proc_macro::bridge::closure::Closure::call
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\closure.rs:27
  14:     0x7ff9be21abb7 - proc_macro::bridge::client::{{impl}}::drop::{{closure}}
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:243
  15:     0x7ff9be219853 - proc_macro::bridge::scoped_cell::ScopedCell::replace
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\scoped_cell.rs:74
  16:     0x7ff9be219853 - proc_macro::bridge::client::{{impl}}::with::{{closure}}
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:290
  17:     0x7ff9be219853 - std::thread::local::LocalKey::try_with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\src\libstd\thread\local.rs:263
  18:     0x7ff9be219853 - std::thread::local::LocalKey::with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\src\libstd\thread\local.rs:239
  19:     0x7ff9be219853 - proc_macro::bridge::client::BridgeState::with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:289
  20:     0x7ff9be219853 - proc_macro::bridge::Bridge::with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:327
  21:     0x7ff9be219853 - proc_macro::bridge::client::TokenStream::drop
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:236
  22:     0x7ff9be219853 - proc_macro::bridge::client::{{impl}}::drop
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:55
  23:     0x7ff9be1e87de - core::ptr::drop_in_place<proc_macro::bridge::client::TokenStream>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libcore\ptr\mod.rs:184
  24:     0x7ff9be1e800e - core::ptr::drop_in_place<proc_macro::TokenStream>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libcore\ptr\mod.rs:184
  25:     0x7ff9be20489a - paste::expand
                               at C:\Users\Sympatron\.cargo\registry\src\github.com-1ecc6299db9ec823\paste-1.0.3\src\lib.rs:256
  26:     0x7ff9ead61030 - <unknown>
  27:     0x7ff9ead64a52 - is_exception_typeof
  28:     0x7ff9ead6e7a4 - _C_specific_handler
  29:     0x7ff9ead63cc8 - is_exception_typeof
  30:     0x7ff9ead6f0d1 - _CxxFrameHandler3
  31:     0x7ffa0b98124f - _chkstk
  32:     0x7ffa0b8fd9b2 - RtlUnwindEx
  33:     0x7ff9ead6ec62 - _C_specific_handler
  34:     0x7ff9ead62955 - is_exception_typeof
  35:     0x7ff9ead62d81 - is_exception_typeof
  36:     0x7ff9ead63dc4 - is_exception_typeof
  37:     0x7ff9ead6f0d1 - _CxxFrameHandler3
  38:     0x7ffa0b9811cf - _chkstk
  39:     0x7ffa0b94a209 - RtlRaiseException
  40:     0x7ffa0b949fc3 - RtlRaiseException
  41:     0x7ffa092aa799 - RaiseException
  42:     0x7ff9ead66220 - CxxThrowException
  43:     0x7ff701a5e151 - <unknown>
  44:     0x7ff701a5e0d9 - <unknown>
  45:     0x7ff701579008 - <unknown>
  46:     0x7ff701578eb6 - <unknown>
  47:     0x7ff70147d8f4 - <unknown>
  48:     0x7ff70147d88f - <unknown>
  49:     0x7ff7015added - <unknown>
  50:     0x7ff7015a4b21 - <unknown>
  51:     0x7ff701a64770 - <unknown>
  52:     0x7ff7015a4064 - <unknown>
  53:     0x7ff9be209647 - proc_macro::bridge::scoped_cell::ScopedCell::replace
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\scoped_cell.rs:74
  54:     0x7ff9be209647 - proc_macro::bridge::client::{{impl}}::with::{{closure}}
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:290
  55:     0x7ff9be209647 - std::thread::local::LocalKey::try_with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\src\libstd\thread\local.rs:263
  56:     0x7ff9be209647 - std::thread::local::LocalKey::with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\src\libstd\thread\local.rs:239
  57:     0x7ff9be209647 - proc_macro::bridge::client::BridgeState::with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:289
  58:     0x7ff9be209647 - proc_macro::bridge::Bridge::with
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:327
  59:     0x7ff9be209647 - proc_macro::bridge::client::TokenStream::new
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\bridge\client.rs:236
  60:     0x7ff9be209647 - proc_macro::TokenStream::new
                               at /rustc/04488afe34512aa4c33566eb16d8c912a3ae04f9\/src\libproc_macro\lib.rs:108
  61:     0x7ff9be203483 - paste::expand
                               at C:\Users\Sympatron\.cargo\registry\src\github.com-1ecc6299db9ec823\paste-1.0.3\src\lib.rs:176
  62:     0x7ff9be2032bb - paste::paste
                               at C:\Users\Sympatron\.cargo\registry\src\github.com-1ecc6299db9ec823\paste-1.0.3\src\lib.rs:157
  63:     0x7ff9be203391 - paste::item
                               at C:\Users\Sympatron\.cargo\registry\src\github.com-1ecc6299db9ec823\paste-1.0.3\src\lib.rs:166
  64:     0x7ff9be1e7998 - core::ops::function::FnOnce::call_once<fn(proc_macro::TokenStream) -> proc_macro::TokenStream,tuple<proc_macro::TokenStream>>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libcore\ops\function.rs:233
  65:     0x7ff9be1e3a76 - proc_macro::bridge::client::{{impl}}::expand1::run::{{closure}}<fn(proc_macro::TokenStream) -> proc_macro::TokenStream>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:407
  66:     0x7ff9be1e2fe0 - proc_macro::bridge::client::run_client::{{closure}}::{{closure}}<proc_macro::bridge::client::TokenStream,proc_macro::bridge::client::TokenStream,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:375
  67:     0x7ff9be1e2218 - proc_macro::bridge::scoped_cell::{{impl}}::set::{{closure}}<proc_macro::bridge::client::BridgeStateL,tuple<>,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\scoped_cell.rs:79
  68:     0x7ff9be1e28e2 - proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>::replace<proc_macro::bridge::client::BridgeStateL,tuple<>,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\scoped_cell.rs:74
  69:     0x7ff9be1e21f5 - proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>::set<proc_macro::bridge::client::BridgeStateL,tuple<>,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\scoped_cell.rs:79
  70:     0x7ff9be1e391c - proc_macro::bridge::client::{{impl}}::enter::{{closure}}<tuple<>,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:323
  71:     0x7ff9be1e55dc - std::thread::local::LocalKey<proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>>::try_with<proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>,closure-1,tuple<>>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\thread\local.rs:263
  72:     0x7ff9be1e50ee - std::thread::local::LocalKey<proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>>::with<proc_macro::bridge::scoped_cell::ScopedCell<proc_macro::bridge::client::BridgeStateL>,closure-1,tuple<>>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\thread\local.rs:239
  73:     0x7ff9be1e3798 - proc_macro::bridge::Bridge::enter<tuple<>,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:323
  74:     0x7ff9be1e2f05 - proc_macro::bridge::client::run_client::{{closure}}<proc_macro::bridge::client::TokenStream,proc_macro::bridge::client::TokenStream,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:368
  75:     0x7ff9be1e1266 - std::panic::{{impl}}::call_once<tuple<>,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panic.rs:318
  76:     0x7ff9be1e5b30 - std::panicking::try::do_call<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panicking.rs:348
  77:     0x7ff9be2062e7 - paste::is_flat_group::{{impl}}::eq
  78:     0x7ff9be1e599a - std::panicking::try<tuple<>,std::panic::AssertUnwindSafe<closure-0>>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panicking.rs:325
  79:     0x7ff9be1e5056 - std::panic::catch_unwind<std::panic::AssertUnwindSafe<closure-0>,tuple<>>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libstd\panic.rs:394
  80:     0x7ff9be1e2d40 - proc_macro::bridge::client::run_client<proc_macro::bridge::client::TokenStream,proc_macro::bridge::client::TokenStream,closure-0>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:367
  81:     0x7ff9be1e3a2d - proc_macro::bridge::client::{{impl}}::expand1::run<fn(proc_macro::TokenStream) -> proc_macro::TokenStream>
                               at C:\Users\Sympatron\.rustup\toolchains\stable-x86_64-pc-windows-msvc\lib\rustlib\src\rust\src\libproc_macro\bridge\client.rs:407
  82:     0x7ff701a64562 - <unknown>
  83:     0x7ff701a62ec7 - <unknown>
  84:     0x7ff7015a4109 - <unknown>
  85:     0x7ff701481aca - <unknown>
  86:     0x7ff70144b562 - <unknown>
  87:     0x7ff7014622e6 - <unknown>
  88:     0x7ff70146261c - <unknown>
  89:     0x7ff701579133 - <unknown>
  90:     0x7ff70144e8a7 - <unknown>
  91:     0x7ff702171460 - <unknown>
  92:     0x7ffa099a7bd4 - BaseThreadInitThunk
  93:     0x7ffa0b94ce51 - RtlUserThreadStart
thread panicked while panicking. aborting.
[ERROR proc_macro_api::process] proc macro server crashed, server process state: Ok(Some(ExitStatus(ExitStatus(3221225501))))

[Piping]

[rust-analyzer macro-error] [E] proc macro server crashed +1

[Piping]

rust-analyzer macro-error] [E] Empty result

[Piping]

Otherwise, excessive highlight warning
[rust-analyzer unresolved-proc-macro] [H] proc macro not expanded

[Sympatron]

@Piping Could you reproduce the error? I don't understand your comments.

[lnicola]

@Sympatron can you try with the nightly version?

[Sympatron]

@lnicola Seems to be fixed on nightly (version 0.3.413).

[Piping]

@Sympatron I am using vim and Coc.vim together with rust-analyzer. I can reproduce crash in my workspace with a different project. ( I used maud crate which heavily depends on proc-macro).

My Coc Setup

{
    "rust-analyzer.cargo.loadOutDirsFromCheck": true,
    "rust-analyzer.procMacro.enable": true,
    // comment  "rust-analyzer.diagnostics.disabled": [ "macro-error", "unresolved-proc-macro" ],
    "rust-analyzer.updates.channel": "nightly"
}

[pronvis]

I use nvim + Coc.vim and after update to rust-analyzer-mac with version: dbd0cfb have proc macro server crashed. Before update all was fine. I don't remember previous version, but it is ~1month old.

[lnicola]

The original crash in this issue is fixed. We can track further ones with no error messages under #6880.

[comicfans]

seems I've hit similar problem again, (I've seen heap-use-after-free error in neovim lsp.log, but didn't save it, can not confirm if the heap-use-after-free error is triggered by rust-analyzer).

I'm using neovim builtin lsp
rust-analyzer 71117e6 2021-06-01 nightly

coredump
Core was generated by `/home/wangxinyu/vim_asan_bug/rust-analyzer-x86_64-unknown-linux-gnu proc-macro'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007fe0dd196777 in __memmove_avx_unaligned_erms () from /usr/lib/libc.so.6
backtrace shows:

#0  0x00007fe0dd196777 in __memmove_avx_unaligned_erms () from /usr/lib/libc.so.6
#1  0x00005632562f06d0 in <proc_macro_srv::proc_macro::bridge::buffer::Buffer<T> as core::convert::From<alloc::vec::Vec<T>>>::from::extend_from_slice ()
#2  0x00007fe0da00734b in proc_macro::bridge::buffer::Buffer<T>::extend_from_slice ()
    at library/proc_macro/src/bridge/buffer.rs:99
#3  <proc_macro::bridge::buffer::Buffer<u8> as std::io::Write>::write_all () at library/proc_macro/src/bridge/buffer.rs:129
#4  <&[u8] as proc_macro::bridge::rpc::Encode<S>>::encode () at library/proc_macro/src/bridge/rpc.rs:212
#5  <&str as proc_macro::bridge::rpc::Encode<S>>::encode () at library/proc_macro/src/bridge/rpc.rs:227
#6  proc_macro::bridge::client::Ident::new::{{closure}} () at library/proc_macro/src/bridge/client.rs:242
#7  proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::with::{{closure}} ()
    at library/proc_macro/src/bridge/client.rs:336
#8  proc_macro::bridge::client::BridgeState::with::{{closure}}::{{closure}} () at library/proc_macro/src/bridge/client.rs:293
#9  proc_macro::bridge::scoped_cell::ScopedCell<T>::replace () at library/proc_macro/src/bridge/scoped_cell.rs:75
#10 proc_macro::bridge::client::BridgeState::with::{{closure}} () at library/proc_macro/src/bridge/client.rs:291
#11 std::thread::local::LocalKey<T>::try_with ()
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/thread/local.rs:400
#12 std::thread::local::LocalKey<T>::with ()
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/thread/local.rs:376
#13 proc_macro::bridge::client::BridgeState::with () at library/proc_macro/src/bridge/client.rs:290
#14 proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::with () at library/proc_macro/src/bridge/client.rs:329
#15 proc_macro::bridge::client::Ident::new () at library/proc_macro/src/bridge/client.rs:237
#16 0x00007fe0d9fc4cf4 in proc_macro2::imp::Ident::new (string=..., span=...)
    at /home/wangxinyu/.cargo/registry/src/mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd/proc-macro2-1.0.19/src/wrapper.rs:656
#17 0x00007fe0d9fca0b9 in proc_macro2::Ident::new (string=..., span=...)
    at /home/wangxinyu/.cargo/registry/src/mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd/proc-macro2-1.0.19/src/lib.rs:886
#18 0x00007fe0d9fa218f in quote::__private::push_ident (tokens=0x7ffcc4fe0de0, s=...)
    at /home/wangxinyu/.cargo/registry/src/mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd/quote-1.0.7/src/runtime.rs:219
#19 0x00007fe0d9dbe86e in serde_derive::ser::expand_derive_serialize (input=0x7ffcc4fe0ff0)
    at /home/wangxinyu/.cargo/registry/src/mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd/serde_derive-1.0.114/src/ser.rs:42
#20 0x00007fe0d9daaf7f in serde_derive::derive_serialize (input=...)
    at /home/wangxinyu/.cargo/registry/src/mirrors.tuna.tsinghua.edu.cn-df7c3c540f42cdbd/serde_derive-1.0.114/src/lib.rs:81
#21 0x00007fe0d9d8518e in core::ops::function::FnOnce::call_once ()
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/core/src/ops/function.rs:227
#22 0x00007fe0d9daf1a6 in proc_macro::bridge::client::Client<fn(proc_macro::TokenStream) -> proc_macro::TokenStream>::expand1::run::{{closure}} (input=...) at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:410
#23 0x00007fe0d9dae7e3 in proc_macro::bridge::client::run_client::{{closure}}::{{closure}} ()
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:377
#24 0x00007fe0d9d481e7 in proc_macro::bridge::scoped_cell::ScopedCell<T>::set::{{closure}} ()
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/scoped_cell.rs:80
#25 0x00007fe0d9d48473 in proc_macro::bridge::scoped_cell::ScopedCell<T>::replace (self=0x56325854e648, replacement=...,
    f=...) at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/scoped_cell.rs:75
#26 0x00007fe0d9d481c4 in proc_macro::bridge::scoped_cell::ScopedCell<T>::set (self=0x56325854e648, value=..., f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/scoped_cell.rs:80
#27 0x00007fe0d9daf03c in proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter::{{closure}} (
    state=0x56325854e648) at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:325
#28 0x00007fe0d9d4939f in std::thread::local::LocalKey<T>::try_with (self=0x7fe0da1f0a98, f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/thread/local.rs:400
#29 0x00007fe0d9d48eca in std::thread::local::LocalKey<T>::with (self=0x7fe0da1f0a98, f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/thread/local.rs:376
#30 0x00007fe0d9cb891a in proc_macro::bridge::client::<impl proc_macro::bridge::Bridge>::enter (self=..., f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:325
#31 0x00007fe0d9dae604 in proc_macro::bridge::client::run_client::{{closure}} ()
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:370
#32 0x00007fe0d9d7f7f0 in <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once (self=...,
    _args=()) at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/panic.rs:347
#33 0x00007fe0d9ccaefa in std::panicking::try::do_call (data=0x7ffcc4fe1c68 "\001")
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/panicking.rs:401
#34 0x00007fe0d9cdfa4d in __rust_try () at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/panicking.rs:541
#35 0x00007fe0d9ccae31 in std::panicking::try (f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/panicking.rs:365
#36 0x00007fe0d9d82eb0 in std::panic::catch_unwind (f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/std/src/panic.rs:434
#37 0x00007fe0d9dae4ef in proc_macro::bridge::client::run_client (bridge=..., f=...)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:369
#38 0x00007fe0d9daf15c in proc_macro::bridge::client::Client<fn(proc_macro::TokenStream) -> proc_macro::TokenStream>::expand1::run (bridge=..., f=0x7fe0d9daaee0 <serde_derive::derive_serialize>)
    at /rustc/c1e8f3a5857c3c8d095fd212acc6ed442f4cc58b/library/proc_macro/src/bridge/client.rs:410
#39 0x00005632562d8653 in proc_macro_srv::proc_macro::bridge::server::run_server ()
#40 0x00005632562eba95 in proc_macro_srv::dylib::Expander::expand ()
#41 0x00005632562cb99d in proc_macro_srv::ProcMacroSrv::expand ()
#42 0x00005632562e57c4 in proc_macro_srv::cli::run ()
#43 0x000056325669e3b0 in rust_analyzer::main ()
#44 0x00005632566cd7d3 in std::sys_common::backtrace::__rust_begin_short_backtrace ()
#45 0x00005632566c1899 in std::rt::lang_start::{{closure}} ()
#46 0x00005632567307e5 in core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once ()
#47 std::panicking::try::do_call () at library/std/src/panicking.rs:379
#48 std::panicking::try () at library/std/src/panicking.rs:343
#49 std::panic::catch_unwind () at library/std/src/panic.rs:431
#50 std::rt::lang_start_internal () at library/std/src/rt.rs:51
#51 0x00005632566a0b22 in main () at library/std/src/panicking.rs:519

my default toolchain
rustc 1.54.0-nightly (c1e8f3a58 2021-05-30)

[lnicola]

@comicfans that's related to #8925, #8928, #8929 and #9047 (comment) (not sure we need three issues for it, though).

You can either:

• use an older nightly
• disable proc macros
• use a stable toolchain

We won't be able to merge any fix soon, unfortunately.