Can't handle certain try-catch blocks

[mhauru]

julia> function g()
           try
               produce(1)
               error("")
           catch
               produce(2)
           end
           return nothing
       end
g (generic function with 1 method)

julia> tt = TapedTask(nothing, g); a = :start; while (a != nothing) a = consume(tt); println(a) end
ERROR: MethodError: no method matching inc_args(::Core.EnterNode)
The function `inc_args` exists, but no method is defined for this combination of argument types.

Closest candidates are:
  inc_args(::Core.ReturnNode)
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:447
  inc_args(::Libtask.BasicBlockCode.IDPhiNode)
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:450
  inc_args(::Expr)
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:446
  ...

Stacktrace:
 [1] derive_copyable_task_ir(ir::Libtask.BasicBlockCode.BBCode)
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:511
 [2] build_callable(sig::Type{Tuple{typeof(g)}})
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:89
 [3] TapedTask(taped_globals::Nothing, fargs::Function; kwargs::@Kwargs{})
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:282
 [4] TapedTask(taped_globals::Nothing, fargs::Function)
   @ Libtask ~/.julia/packages/Libtask/EU2aq/src/copyable_task.jl:279
 [5] top-level scope
   @ REPL[34]:1

I don't have a real-world use case that hits this, just found it when trying to make an MWE of something else.

[yebai]

This is also a limitation of Mooncake. A more user-friendly message is useful.

[yebai]

Relevant comments and commits in Mooncake.