https://issues.dlang.org/show_bug.cgi?id=21950

          Issue ID: 21950
           Summary: cod1: Assertion failure for noreturn parameter
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P1
         Component: dmd
          Assignee: nobody@puremagic.com
          Reporter: moonlightsentinel@disroot.org

The following code triggers an assertion failure in the backend:

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

void foo(noreturn);

void overloads()
{
    noreturn n;
    foo(n);
}
=========================================

Assertion failed: 0, file src\dmd\backend\cod1.d, line 4214

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