[Bug 1322784]

[L. David Baron]

Comment on attachment 8561105
Pad heap allocations passed to flag_qsort() on x86 Linux to work around gcc bug affecting Ubuntu packages

Approval Request Comment
[Feature/regressing bug #]: not a regression in our codebase
[User impact if declined]: #3 topcrash on Linux, specific to 32-bit Ubuntu-distributed builds.  Firefox will randomly crash on 32-bit Linux builds the first time the user uses a textarea or otherwise does something that initializes the spellchecker.  (It only crashes a small percentage of the time, but it affects a large number of users.)
[Describe test coverage new/current, TreeHerder]:  None.  Just landed on mozilla-inbound.  I don't know of any way to test that the fix works without shipping it on the release channel.
[Risks and why]: Low risk; it's padding a few allocations in the spellcheck code with 2 extra bytes on all 32-bit Linux builds.
[String/UUID change made/needed]: no

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https://bugs.launchpad.net/bugs/1322784

Title:
  Firefox crashes in flag_qsort during spellchecker initialization on
  x86 due to gcc bug

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