[Issue 21403] [ICE] dmd/backend/cgcs.d:375: Assertion `0' failed.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21403

--- Comment #3 from Walter Bright <bugzilla at digitalmars.com> ---
And a minimal test case:

 int[] mul11ret3(ref int[] s);

 void test(int[] val) {
    (val ~= mul11ret3(val)) ~= 7;
 }

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