[Issue 17863] cannot deduce function with implicit conversion

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17863

--- Comment #1 from anonymous4 <dfj1esp02 at sneakemail.com> ---
Error: template f2 cannot deduce function from argument types !()(int),
candidates are:
       f2(T)(immutable T a)
Error: template f3 cannot deduce function from argument types !()(int),
candidates are:
       f3(T)(shared T a)

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