[Issue 22037] New: diagnostic: undefined identifier errors not suppressed when gagging

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22037

          Issue ID: 22037
           Summary: diagnostic: undefined identifier errors not suppressed
                    when gagging
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: ibuclaw at gdcproject.org

Seen when running the cxx-unittest program:
---
$ ./cxx-unittest
rootobject.d(2): Error: undefined identifier `Object`


Not sure whether this is reproducible with just a D source file alone.

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