[Issue 19731] auto struct methods whose address is taken don't test invariants

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19731

--- Comment #5 from FeepingCreature <default_357-line at yahoo.de> ---
Okay, naively copying the method, running semantic3 and copying the type back
does not work. Darn.

--