Rust sometimes emits calls to _Unwind_Resume on opt-level = 0 with panic = abort

[CryZe]

I don't think this is intentional. I'm working on a no_std project and for the first time tried to compile with the debug profile and there seem to be undefined references to _Unwind_Resume even though panic = "abort" is specified. opt-level = 1 seems to get rid of those calls.

[glandium]

As of #67502, this happens at any opt-level because of libstd itself containing these symbols.

[glandium]

(and libbacktrace)

[Enselic]

Triage: Please provide a minimal way to reproduce the problem (if this still is a problem). Thanks!

[jackh726]

Closing since there is no reproduction.

[bjorn3]

I'm fairly certain this is still an issue as the standard library is still compiled with panic=unwind. The default -Clink-dead-code=no may mask this in most cases, but that is not the solution.