[PATCH] D41009: [FuzzMutate] Don't crash when mutator is unable to find operation

Justin Bogner via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Dec 18 13:08:58 PST 2017

bogner accepted this revision.
bogner added a comment.
This revision is now accepted and ready to land.

I'm a little worried that this makes us more likely to get into the "unable to make forward progress" case of the fuzzer loop, which could waste time and make it harder to tell that we're hitting something we can't handle. That said, it does re-try for these cases, so I suppose it's good to make as much progress as we can until we do get stuck.

Let's go ahead and do this, but please keep an eye out for any problems due to letting the fuzzers get stuck instead of bailing on cases we don't handle.


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