Fail with parametric type

[iblislin]

julia> struct B{T} end

julia> (::B)() = 42

julia> @enter B{Int}()()
ERROR: type UnionAll has no field name
Stacktrace:
 [1] maybe_step_through_wrapper!(::Array{ASTInterpreter2.JuliaStackFrame,1}) at /home/iblis/.julia/v0.6/ASTInterpreter2/src/ASTInterpreter2.jl:422

[jamii]

@iblis17

I'm not sure what the intended behavior is here, but a temporary workaround is to change the line to:

parameter = Base.unwrap_unionall(stack[1].meth.sig).parameters[1]
is_kw = (:name in fieldnames(parameter)) && startswith(String(parameter.name.name), "#kw")

That at least lets the debugger continue, and it doesn't seem to have any other problems with this kind of code.

[staticfloat]

Just a note that this still happens and causes problems in Flux with BatchNorm, e.g.:

using Flux, ASTInterpreter2
x = randn(10, 10, 4, 1)
BN = BatchNorm(4)

Trying to @enter BN(x) gives:

julia> @enter BN(x)
ERROR: type UnionAll has no field name
Stacktrace:
 [1] getproperty(::Type, ::Symbol) at ./sysimg.jl:15
 [2] maybe_step_through_wrapper!(::Array{ASTInterpreter2.JuliaStackFrame,1}) at /home/staticfloat/.julia/dev/ASTInterpreter2/src/ASTInterpreter2.jl:392
 [3] top-level scope at /home/staticfloat/.julia/dev/ASTInterpreter2/src/ASTInterpreter2.jl:465

[KristofferC]

Still happens with #37

[timholy]

Fixed by #40