Debugging Function-Like object under Juno

General Usage
,
1

I suspect this is a bug, but I’d like a second opinion in case I’m doing something wrong.

Julia version:

Julia Version 1.1.1
Commit 55e36cc308 (2019-05-16 04:10 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.1 (ORCJIT, sandybridge)
Environment:
  JULIA_EDITOR = atom  -a
  JULIA_NUM_THREADS = 4

A simplified example:

struct Data{Symbol}
   value::Int
end

mutable struct FunLike
   value::Int
   FunLike() = new(0)
end

function (f::FunLike)(x::Data{:a})
   f.value += x.value
end

function (f::FunLike)(x::Data{:b})
   f.value *= x.value
end

Now under REPL in Atom/Juno if you run:

t=FunLike()
@Juno.enter t(Data{:a}(2))

You end up stopped in sysimg.jl line 19:

setproperty!(x, f::Symbol, v) = setfield!(x, f, convert(fieldtype(typeof(x), f), v))

The correct function does execute, but I can’t for the life of me stop in that function. Or maybe creating multiple methods for a function like object is considered bad form?

2

This is an issue in the heuristic JuliaInterpreter uses to step through warpper functions:
https://github.com/JuliaDebug/JuliaInterpreter.jl/issues/299

3

Cool, thank you.