[Issue 20737] TLS variables unusable with -betterC for Windows MSVC targets

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20737

--- Comment #5 from Walter Bright <bugzilla at digitalmars.com> ---
More info here:

https://github.com/dlang/dmd/pull/15069

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