[Issue 20626] New: ICE when using typeof of unittest symbol without -unittest flag

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20626

          Issue ID: 20626
           Summary: ICE when using typeof of unittest symbol without
                    -unittest flag
           Product: D
           Version: D2
          Hardware: x86
                OS: Mac OS X
            Status: NEW
          Keywords: ice-on-invalid-code
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: pro.mathias.lang at gmail.com

```
unittest {}
pragma(msg, typeof(__unittest_L1_C1));
```

Compile with `dmd test.d` and you get a segv. Compile with `dmd -unittest
test.d` and it works just fine.
Tested with DMD v2.090.1 & madteer as of 2020-03-03.
Found while working on https://github.com/dlang/dmd/pull/10834

--