[Issue 21956] New: ice on foreach over an AA of noreturn

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21956

          Issue ID: 21956
           Summary: ice on foreach over an AA of noreturn
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Keywords: accepts-invalid
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: b2.temp at gmx.com

this code triggers an assertion in the backend:

---
alias noreturn = typeof(*null);

noreturn[noreturn] nrnr;

int main()
{
    foreach (a; nrnr){}
    return 0;
}  
---

> dmd: src/dmd/backend/cod4.d:416: Assertion `cast(int)sz > 0' failed.

DMD git 9d718f2f8c7f34d3b616791493d9e71d7527f221

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