James Y Knight caa1ebde70 Don't assume that a new cleanup was added to InnermostEHScope. ...

After fa87fa97fb, this was no longer guaranteed to be the cleanup
just added by this code, if IsEHCleanup got disabled. Instead, use
stable_begin(), which _is_ guaranteed to be the cleanup just added.

This caused a crash when a object that is callee destroyed (e.g. with the MS ABI) was passed in a call from a noexcept function.

Added a test to verify.

Fixes: fa87fa97fb

2022-02-04 23:39:42 -05:00

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