[Issue 20154] bad closure if local variables have larger alignment requirements

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20154

--- Comment #2 from Walter Bright <bugzilla at digitalmars.com> ---
Currently, stack alignment is enforced only for 64 bit compilations and 32 bit
OSX compilations. See the setting of `enforcealign` in codgen() in cgcod.d.

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