Paul Bone 572d5164f3 Bug 1410276 - Add a canary field to nsStringBuffer r=bz
This version of the patch hopefully causes fewer performance regressions.
It might be good to apply this and catch some more assertions.

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extra : rebase_source : b8674308d581bed4baf6f64a9dd23f2cf995028b
2017-11-09 15:17:35 +11:00
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