[Issue 17836] ICE with custom 'map' template

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17836

--- Comment #1 from elronnd at protonmail.ch ---
Potentially relevant: dmd just segfaults, but gdc actually prints a message:

test.d: In function ‘mmap’:
test.d:7:8: internal compiler error: in get_frame_for_symbol, at
d/d-codegen.cc:2208
     fun(item);
        ^

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