[Issue 18232] Union methods fail to initialize local variables to .init

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18232

hsteoh at quickfur.ath.cx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|string variable in toString |Union methods fail to
                   |method of Union: invalid    |initialize local variables
                   |code (crash/segfault)       |to .init

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