ko1 / atdot.net wrote:
> Issue #14867 has been updated by ko1 (Koichi Sasada).
> 
> 
> "multi-thread-safe" is not correct. It was my mistake and it should be "signal handler safe" because this API is used by stackprof (used with SIGPROF).
> 
> however, I recognize this assumption is broken with the following ticket.
> 
> 
> ```
> commit 5a1dfb04bc2b09fcf8f3427cac72d0ce52a45eb2

Oops :x nobody told me about stackprof and SIGPROF usage :x

>     vm_trace: implement postponed_jobs as st_table

> I believe this commit should be reverted (and I need to write a comment about assumption).

Reverted and commented in r65316

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