[Issue 22748] New: ~this() @nogc { synchronized ...... } liable to onMemoryOperationError

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22748

          Issue ID: 22748
           Summary: ~this() @nogc { synchronized ...... } liable to
                    onMemoryOperationError
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: destructionator at gmail.com

I don't have a minimized example, this came up in the middle of a large work
application, but examining the source code and the stack trace reveals the
issue.

The destructor is @nogc hoping to avoid these, but this slipped through. I'm
not sure if it should actually fail the nogc check (though it does fail a
nothrow check which is interesting but not necessarily a bug per se), but
regardless we should do something.

synchronized(this) calls ensureMontior which calls GC.setAttr which throws the
invalid memory operation error.

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