[Issue 20686] ICE with __traits and templated member function referenced in non-templated member function

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20686

--- Comment #3 from moonlightsentinel at disroot.org ---
Bisection blames this commit:

commit caf888bd949a119c2136be6ee7011eedbf3f5f0b
Author: Basile Burg <basile.b at gmx.com>
Date:   Sat Jul 6 13:37:10 2019 +0200

fix issue 19708 - Can't use __traits(getAttributes, ...)[...] as a type

Introduced in https://github.com/dlang/dmd/pull/10144

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