[julia-users] Ambiguous method definitions

[Robert Gates]

I was wondering how this can happen:

*julia> **type T1; end*


*julia> **type T2; end*


*julia> **f(a::T1...) = ()*

*f (generic function with 1 method)*


*julia> **f(a::T2...) = ()*

WARNING: New definition 

    f(Main.T2...) at none:1

is ambiguous with: 

    f(Main.T1...) at none:1.

To fix, define 

    f()

before the new definition.

*f (generic function with 2 methods)*

This is a fresh julia 0.4.5 session. I actually encountered this when using 
two packages and then built this MWE.