Test does not fail during the compilation stage if build fails when `build_locally=False`

[vkarak]

This is confusing because (a) this behaviour is different when build_locally=True and (b) the test is successful if it's compile-only (see build fixtures).

@giordano I think you've hit this before but I'm not sure if you've opened an issue already.

[giordano]

I had opened #2936 (fixed by #2993), which was about build job via PBS failing, but ReFrame didn't know about it. But this ticket sounds slightly different (and not specific to PBS)?

[vkarak]

It seems to be related to the squeue backend that I have been testing and it seems not to be a bug after all, but a limitation of this backend, since we cannot retrieve the exit code. I will investigate further and add at least a note in the docs.

[vkarak]

I verified that this is due to the squeue backend that cannot retrieve the job's exit code and therefore the default validation function for compile-only tests fails. I will add a note in the docs and close this issue.