[Issue 22184] Template instantiation in static ifs in mutual recursion classes fail

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22184

Tomoya Tanjo <ttanjo at gmail.com> changed:

           What    |Removed                     |Added
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          Component|phobos                      |dmd

--- Comment #3 from Tomoya Tanjo <ttanjo at gmail.com> ---
I fixed the issue title and the `Component` section because it is a issue of
dmd rather than std.sumtype.

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