[Issue 20237] with gagged errors from is(typeof()), compiler forgets that it failed to compile a method

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20237

FeepingCreature <default_357-line at yahoo.de> changed:

           What    |Removed                     |Added
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           Keywords|                            |accepts-invalid

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