Don't recurse into Base.Threads. Fixes #74

Author: timholy

src/JuliaInterpreter.jl

@@ -330,7 +330,7 @@ function prepare_call(@nospecialize(f), allargs; enter_generated = false)
     args = allargs
     sig = method.sig
     isa(method, TypeMapEntry) && (method = method.func)
-    if method.module == Core.Compiler || method ∈ compiled_methods
+    if method.module == Core.Compiler || method.module == Base.Threads || method ∈ compiled_methods
         return Compiled()
     end
     # Get static parameters

test/interpret.jl

@@ -256,3 +256,10 @@ function add1234(x::Tuple{Int32,Int32,Int32,Int32})
         x)
 end
 @test @interpret(add1234(map(Int32,(2,3,4,5)))) === map(Int32,(3,5,7,9))
+
+# issue #74
+let A = [1]
+    wkd = WeakKeyDict()
+    @interpret setindex!(wkd, 2, A)
+    @test wkd[A] == 2
+end