[Issue 18493] [betterC] Can't use aggregated type with postblit

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18493

--- Comment #7 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/dmd

https://github.com/dlang/dmd/commit/8a33fb6c692d0b2c1f03ceeb65c28beaebd932a0
Add test for issue 18493

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