proc-macro-srv expand panic related with ntest-timeout

rust-analyzer version: rust-analyzer version: 0.4.1654-standalone (c405509f2 2023-09-08)
rustc version: rustc 1.71.1 (eb26296b5 2023-08-03)
vscode version:
Version: 1.82.0 (Universal)
Commit: 8b617bd08fd9e3fc94d14adb8d358b56e3f72314
Date: 2023-09-06T22:09:41.364Z
Electron: 25.8.0
ElectronBuildId: 23503258
Chromium: 114.0.5735.289
Node.js: 18.15.0
V8: 11.4.183.29-electron.0
OS: Darwin arm64 22.6.0
relevant settings:

** error logs in language server output **

thread '<unnamed>' panicked at 'Expected identifier!', /home/gftea/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ntest_timeout-0.9.0/src/lib.rs:85:52
stack backtrace:
   0: rust_begin_unwind
             at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library/std/src/panicking.rs:593:5
   1: core::panicking::panic_fmt
             at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library/core/src/panicking.rs:67:14
   2: core::panicking::panic_display
             at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library/core/src/panicking.rs:150:5
   3: core::panicking::panic_str
             at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library/core/src/panicking.rs:134:5
   4: core::option::expect_failed
             at /rustc/eb26296b556cef10fb713a38f3d16b9886080f26/library/core/src/option.rs:1932:5
   5: core::option::Option<T>::expect
   6: ntest_timeout::check_other_attributes
   7: ntest_timeout::timeout
   8: core::ops::function::Fn::call
   9: proc_macro::bridge::client::Client<(proc_macro::TokenStream,proc_macro::TokenStream),proc_macro::TokenStream>::expand2::{{closure}}::{{closure}}
  10: proc_macro::bridge::client::run_client::{{closure}}::{{closure}}::{{closure}}
  11: proc_macro::bridge::scoped_cell::ScopedCell<T>::set::{{closure}}
  12: proc_macro::bridge::scoped_cell::ScopedCell<T>::replace
  13: proc_macro::bridge::client::run_client::{{closure}}::{{closure}}
  14: std::thread::local::LocalKey<T>::try_with
  15: proc_macro::bridge::client::run_client::{{closure}}
  16: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
  17: std::panicking::try::do_call
  18: __rust_try
  19: std::panicking::try
  20: proc_macro::bridge::client::run_client
  21: proc_macro::bridge::client::Client<(proc_macro::TokenStream,proc_macro::TokenStream),proc_macro::TokenStream>::expand2::{{closure}}
  22: proc_macro::bridge::selfless_reify::reify_to_extern_c_fn_hrt_bridge::wrapper
  23: proc_macro::bridge::server::run_server::<proc_macro_srv::abis::abi_sysroot::ra_server::RustAnalyzer, (proc_macro::bridge::Marked<proc_macro_srv::abis::abi_sysroot::ra_server::token_stream::TokenStream, proc_macro::bridge::client::TokenStream>, proc_macro::bridge::Marked<proc_macro_srv::abis::abi_sysroot::ra_server::token_stream::TokenStream, proc_macro::bridge::client::TokenStream>), core::option::Option<proc_macro::bridge::Marked<proc_macro_srv::abis::abi_sysroot::ra_server::token_stream::TokenStream, proc_macro::bridge::client::TokenStream>>, proc_macro::bridge::server::SameThread>
  24: <proc_macro_srv::dylib::Expander>::expand

Start with the reported panic in ntest_timeout-0.9.0/src/lib.rs at check_other_attributes and trace how proc_macro_srv invokes the proc-macro expansion. Reproduce the ntest-timeout case against the reported Rust and rust-analyzer versions, then verify that expansion no longer panics for this input.