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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - llvm-cov: "counter mismatch" warnings are handled in ambiguous way"
href="https://bugs.llvm.org/show_bug.cgi?id=41533">41533</a>
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<th>Summary</th>
<td>llvm-cov: "counter mismatch" warnings are handled in ambiguous way
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<th>Product</th>
<td>new-bugs
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mmoroz@google.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<pre>This has bitten us several times, the most recent is in
<a href="https://github.com/google/oss-fuzz/issues/2330">https://github.com/google/oss-fuzz/issues/2330</a>
The problem is that llvm-cov prints a warning, e.g.:
warning: /out/dumps/simple_round_trip.profdata: Function basic block count
change detected (counter mismatch)
and interrupts the execution. IMO it should be either of the following:
1) print an error and interrupt the execution
2) print a warning and continue the execution (if possible?)
Otherwise, we get just a warning but a significantly incomplete report (depends
on the timing / threading, if you're merging multiple dumps).
What do others think?</pre>
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