Optionally allow exceptions from multiprocessing forkserver preload imports to be raised #141860
Description
Feature or enhancement
Proposal:
This is more of a development debugging tool, but the imports done in a child process due to multiprocessing.set_forkserver_preload() have always had their errors silently ignored. In many situations this is desirable, we don't want to break forkserver. But it makes debugging and diagnosis of problems in the forkserver process hard, leading to silently lower performance.
Lets add an optional keyword argument to allow preloads to raise errors. This comes from work done originally in #99515 for issue #98552. PR #141859 is the modern take on this.
Has this already been discussed elsewhere?
No response given
Links to previous discussion of this feature:
No response