[Issue 2789] Functions overloads are not checked for conflicts

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=2789

--- Comment #21 from Witold Baryluk <witold.baryluk+d at gmail.com> ---
dmd 2.094.2 - incorrectly compiles successfully

dmd 2.095.0 - correctly shows error and aborts

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