minor fixes

src/codegen/compvars.cpp

@@ -2773,6 +2773,10 @@ public:
         return rtn;
     }
     ConcreteCompilerVariable* makeConverted(IREmitter& emitter, VAR* var, ConcreteCompilerType* other_type) override {
+        if (other_type == other_type->getBoxType()) {
+            assert(other_type == UNKNOWN);
+            return emitter.getNone()->makeConverted(emitter, other_type);
+        }
         llvm::Value* v = llvm::UndefValue::get(other_type->llvmType());
         return new ConcreteCompilerVariable(other_type, v);
     }

src/runtime/inline/dict.cpp

@@ -20,6 +20,7 @@
 namespace pyston {
 
 BoxedDictIterator::BoxedDictIterator(BoxedDict* d) : d(d), it(d->d.begin()), itEnd(d->d.end()) {
+    Py_INCREF(d);
 }
 
 Box* dict_iter(Box* s) noexcept {

test/tests/arg_unpacking.py

-# expected: reffail
 def f((a,b)):
     print a,b
     print sorted(list(locals().iteritems()))