[Issue 19473] DMD Segfault when compiling sample code

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19473

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
It's an infinite loop trying to determine the sizes for:

    P => D => UTpl => P ...

resulting in a stack overflow.

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