Mismatched bug number and crash signature

[hsinyi]

In Quality report for DOM Core, the bug number associated for the crash signature "mozilla::RestyleManager::ElementStateChanged" is wrong. The bug in the quality report is Bug 1651070 - doesn't deal with dynamic lang changes correctly., which is no longer true. The crash signature was removed from Bug 1651070, and the bug 1793410 is instead associated with that signature , which is also the bug in https://crash-stats.mozilla.org

[marco-c]

The quality report script is getting the data from https://mozilla.github.io/stab-crashes/nightly.json, which has bug 1651070 in the list.
We'll need to debug this in https://github.com/mozilla/stab-crashes.

[marco-c]

Ah, I know the reason.
The script in https://github.com/mozilla/stab-crashes is considering all signatures associated to duplicated bugs as also belonging to the bug targeted by the duplication.

In this case, https://bugzilla.mozilla.org/show_bug.cgi?id=1804806 is marked as duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=1651070. https://bugzilla.mozilla.org/show_bug.cgi?id=1804806 has "mozilla::RestyleManager::ElementStateChanged", and so the script assumes "mozilla::RestyleManager::ElementStateChanged" is also associated with https://bugzilla.mozilla.org/show_bug.cgi?id=1651070.

[marco-c]

So in practice this is "by design". We could drop this rule, but then we'd risk missing some cases where a signature hasn't been copied from a duplicate to the target.