DivideError when dividing a zero rational by a complex number

[yuyichao]

This happens in the numbers test on #15917

Slightly simplified repro:

julia> Rational(0, 3) / Complex(3, 2)
ERROR: DivideError: integer division error
 [inlined code] from ./rational.jl:19
 in +(::Rational{Int64}, ::Rational{Int64}) at ./rational.jl:179
 [inlined code] from ./complex.jl:4
 in inv(::Complex{Rational{Int64}}) at ./complex.jl:118
 in /(::Rational{Int64}, ::Complex{Int64}) at ./rational.jl:191
 in eval(::Module, ::Any) at ./boot.jl:237

[yuyichao]

Wow, the offending method is really old ... 93710f3

[andreasnoack]

Even older since that commit is just some cleanup. I think this is the real offender d0ac203. By the way, it looks as if you, in the summer of 2010, could muliply with white space.

[yuyichao]

The bad one is the /(::Rational, ::Complex) which is added (agrees with the commit message) by the commit I linked. The clean up done in that commit is actually for another function....

[andreasnoack]

Yes, my bad. I was carried away with the Julia archeology.