Error on must-relocking of non-recursive mutex #1628
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mayLocks analysis can warn on it, but mutex analysis can be definite about it.
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mayLocks analysis can warn on it, but mutex analysis can be definite about it.
Inspired by https://gitlab.com/sosy-lab/benchmarking/sv-benchmarks/-/merge_requests/1587 which we clearly have the information for, but didn't say anything.
We cannot go to dead code in this case because we don't distinguish error-checking mutexes.