[Issue 24502] [REG2.102.0] Can no longer select manual GC with --DRT-gcopt=gc:manual

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24502

--- Comment #1 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
Introduced in https://github.com/dlang/dmd/pull/14752

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