[Issue 14128] AliasDeclaration allows expressions, causing false code for ThisExp

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=14128

Basile-z <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
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            Summary|wrong alias                 |AliasDeclaration allows
                   |                            |expressions, causing false
                   |                            |code for ThisExp

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