[Issue 20946] Segfault by forward reference and undefined identifier

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20946

uplink.coder at googlemail.com changed:

           What    |Removed                     |Added
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                 CC|                            |uplink.coder at googlemail.com

--- Comment #1 from uplink.coder at googlemail.com ---
This gets triggered in the typeof.
Shouldn't be too hard to fix.

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