[Bug sanitizer/63939] [5 Regression] Massive asan failures (356) on darwin

[howarth at bromo dot med.uc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63939

--- Comment #18 from howarth at bromo dot med.uc.edu ---
Why are we checking in these changes in a piecemeal fashion instead of
addressing all those failing test cases listed in the "Updated patch"?