(In reply to Emily McDonough [:alaskanemily] from comment #3) > * **Which older supported branches are affected by this flaw?**: Everything since Firefox 59 [adding detail] specifically, this was introduced by this change for bug 1423378, I think (where we switched from copying the about-to-be-destructed-temporary into a local variable [which is fine] to capturing it in a reference [which is not-fine]: https://hg.mozilla.org/mozilla-central/rev/60d0c815b98047ab945bf8b7d2c235bc260ba8ac#l1.12 Once we're ready to open this bug up (once the patch has reached all supported releases), we should probably mark it as a regression from bug 1423378.
Bug 1830186 Comment 7 Edit History
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(In reply to Emily McDonough [:alaskanemily] from comment #3) > * **Which older supported branches are affected by this flaw?**: Everything since Firefox 59 [adding detail] specifically, this was introduced by this change for bug 1423378, I think, where we switched from copying the about-to-be-destructed-temporary into a local variable [which is fine] to capturing it in a reference [which is not-fine]: https://hg.mozilla.org/mozilla-central/rev/60d0c815b98047ab945bf8b7d2c235bc260ba8ac#l1.12 Once we're ready to open this bug up (once the patch has reached all supported releases), we should probably mark it as a regression from bug 1423378.