[Issue 23654] execv_: toAStringz: memory corruption

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23654

--- Comment #10 from anonymous4 <dfj1esp02 at sneakemail.com> ---
As I understand the code initially didn't touch GC (because it can fail after
fork or to match posix guarantees) then regressed to use GC.

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