0.6 regression: issubtype: too few arguments (expected 2)

[SimonDanisch]

this was working on a ~10 days old master:

eltype_or(::Type{<: AbstractGeometry{N, T} where N}, or) where T = T

now only this works:

eltype_or(::Type{G}, or) where G <: (AbstractGeometry{N, T} where N) where T = T

The error: issubtype: too few arguments (expected 2)

Julia Version 0.6.0-pre.beta.295
Commit dc907c7* (2017-04-24 04:37 UTC)

[JeffBezanson]

Caused by #21466. The problem is that we have a unary operator followed by where.