[Pkg-rust-maintainers] Bug#1102197: rust-futures: flaky autopkgtest

[Sebastian Ramacher]

Source: rust-futures
Version: 0.3.31-1
Severity: serious
X-Debbugs-Cc: sramacher at debian.org

Dear maintainer,

the autopkgtests of rust-futures are flaky. The latest failure is:

https://ci.debian.net/packages/r/rust-futures/testing/amd64/59604837/

test stream_select ... FAILED

failures:

---- stream_select stdout ----

thread 'stream_select' panicked at tests/async_await_macros.rs:356:9:
assertion failed: results.iter().filter(|x| **x == 1).count() >= 299
stack backtrace:
   0: rust_begin_unwind
             at /usr/src/rustc-1.85.0/library/std/src/panicking.rs:692:5
   1: core::panicking::panic_fmt
             at /usr/src/rustc-1.85.0/library/core/src/panicking.rs:75:14
   2: core::panicking::panic
             at /usr/src/rustc-1.85.0/library/core/src/panicking.rs:145:5
   3: async_await_macros::stream_select::{{closure}}
             at ./tests/async_await_macros.rs:356:9
   4: futures_executor::local_pool::block_on::{{closure}}
             at /usr/share/cargo/registry/futures-executor-0.3.31/src/local_pool.rs:316:23
   5: futures_executor::local_pool::run_executor::{{closure}}
             at /usr/share/cargo/registry/futures-executor-0.3.31/src/local_pool.rs:90:37
   6: std::thread::local::LocalKey<T>::try_with
             at /usr/src/rustc-1.85.0/library/std/src/thread/local.rs:308:12
   7: std::thread::local::LocalKey<T>::with
             at /usr/src/rustc-1.85.0/library/std/src/thread/local.rs:272:9
   8: futures_executor::local_pool::run_executor
             at /usr/share/cargo/registry/futures-executor-0.3.31/src/local_pool.rs:86:5
   9: futures_executor::local_pool::block_on
             at /usr/share/cargo/registry/futures-executor-0.3.31/src/local_pool.rs:316:5
  10: async_await_macros::stream_select
             at ./tests/async_await_macros.rs:330:5
  11: async_await_macros::stream_select::{{closure}}
             at ./tests/async_await_macros.rs:328:19
  12: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.85.0/library/core/src/ops/function.rs:250:5
  13: core::ops::function::FnOnce::call_once
             at /usr/src/rustc-1.85.0/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.


failures:
    stream_select

test result: FAILED. 21 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s

error: test failed, to rerun pass `--test async_await_macros`
autopkgtest [16:55:41]: test rust-futures:@: -----------------------]

Older failures include
https://ci.debian.net/packages/r/rust-futures/testing/amd64/58367920/
and others where the logs already have been deleted from ci.debian.net

Cheers
-- 
Sebastian Ramacher