Fix error with parametric types

Fixes JuliaDebug#17
staticfloat · Jan 18, 2019 · b6e849b · b6e849b
1 parent b6d3bfd
commit b6e849b
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/ASTInterpreter2.jl b/src/ASTInterpreter2.jl
@@ -389,7 +389,8 @@ end
 function maybe_step_through_wrapper!(stack)
     last = stack[1].code.code[end-1]
     isexpr(last, :(=)) && (last = last.args[2])
-    is_kw = startswith(String(Base.unwrap_unionall(stack[1].meth.sig).parameters[1].name.name), "#kw")
+    parameter = Base.unwrap_unionall(stack[1].meth.sig).parameters[1]
+    is_kw = (:name in fieldnames(parameter)) && startswith(String(parameter.name.name), "#kw")
     if is_kw || isexpr(last, :call) && any(x->x==SlotNumber(1), last.args)
         # If the last expr calls #self# or passes it to an implemetnation method,
         # this is a wrapper function that we might want to step though