exec-fixtures doesn't display what's wrong

[ripatel-fd]

When executing solfuzz fixtures with exec-fixtures, I'd expect that command to display a diff when there was a divergence.

But the output just tells me that something failed without telling me what's wrong.

[ripatel-fd]

@mjain-jump can we keep these open for now? I'll double check each of them after the PRs went through and then close them

[mjain-jump]

@ripatel-fd think this can be closed