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Jon Coppeard authored
Bug 1597970 - Allow for the possiblity of FinalizationGroupObject's slots being uninitialized r=sfink The problem is that object metadata builder API can trigger GC after the object has been allocated but before its slots have been initialized. The fix is to take account that some slots may be undefined and handle this appropriately. Differential Revision: https://phabricator.services.mozilla.com/D54111 --HG-- extra : moz-landing-system : lando
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