[Issue 23010] mixed in aliaseqs used as type dont initualize

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23010

moonlightsentinel at disroot.org changed:

           What    |Removed                     |Added
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                 CC|                            |moonlightsentinel at disroot.o
                   |                            |rg
           Hardware|x86_64                      |All
                 OS|Linux                       |All

--- Comment #1 from moonlightsentinel at disroot.org ---
N.B.: This code used to trigger an assertion failure in the backend until
2.082.1

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