[Issue 21648] Speculative recursive reference to struct with semantic error prints "error: unknown": Part 2

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21648

--- Comment #4 from FeepingCreature <default_357-line at yahoo.de> ---
I mean, I'd be secretly wondering once I saw that the testsuite passes if I
should just set up a really really longrunning dustmite session between DMD and
the testsuite :)

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