some ref fixes to complex

from_cpython/Modules/cPickle.c

@@ -5932,7 +5932,7 @@ init_stuff(PyObject *module_dict)
 {
     PyObject *copyreg, *t, *r;
 
-#define INIT_STR(S) if (!( S ## _str=PyString_InternFromString(#S)))  return -1;
+#define INIT_STR(S) if (!( S ## _str=PyGC_RegisterStaticConstant(PyString_InternFromString(#S))))  return -1;
 
     if (PyType_Ready(&Unpicklertype) < 0)
         return -1;

from_cpython/Objects/complexobject.c

@@ -289,6 +289,7 @@ try_complex_special_method(PyObject *op) {
         complexstr = PyString_InternFromString("__complex__");
         if (complexstr == NULL)
             return NULL;
+        PyGC_RegisterStaticConstant(complexstr);
     }
     if (PyInstance_Check(op)) {
         f = PyObject_GetAttr(op, complexstr);

src/runtime/complex.cpp

@@ -37,7 +37,7 @@ static Box* toComplex(Box* self) noexcept {
     }
 
     if (PyComplex_Check(self)) {
-        r = (BoxedComplex*)self;
+        r = (BoxedComplex*)incref(self);
     } else if (PyInt_Check(self)) {
         r = new BoxedComplex(static_cast<BoxedInt*>(self)->n, 0.0);
     } else if (PyFloat_Check(self)) {
@@ -285,7 +285,7 @@ Box* complexTruediv(BoxedComplex* lhs, Box* rhs) {
         double res = PyLong_AsDouble(rhs);
         if (res == -1 && PyErr_Occurred())
             throwCAPIException();
-        return complexDivFloat(lhs, (BoxedFloat*)boxFloat(res));
+        return complexDivFloat(lhs, (BoxedFloat*)autoDecref(boxFloat(res)));
     } else {
         return incref(NotImplemented);
     }
@@ -517,7 +517,7 @@ Box* complexDivmodComplex(BoxedComplex* lhs, Box* _rhs) {
     AUTO_DECREF(div);
     div->real = floor(div->real);                                    /* Use the floor of the real part. */
     div->imag = 0.0;
-    BoxedComplex* mod = (BoxedComplex*)complexSubComplex(lhs, (BoxedComplex*)complexMulComplex(rhs_complex, div));
+    BoxedComplex* mod = (BoxedComplex*)complexSubComplex(lhs, (BoxedComplex*)autoDecref(complexMulComplex(rhs_complex, div)));
     AUTO_DECREF(mod);
     Box* res = BoxedTuple::create({ div, mod });
     return res;
@@ -574,7 +574,7 @@ Box* complexModComplex(BoxedComplex* lhs, Box* _rhs) {
     AUTO_DECREF(div);
     div->real = floor(div->real);                            /* Use the floor of the real part. */
     div->imag = 0.0;
-    BoxedComplex* mod = (BoxedComplex*)complexSubComplex(lhs, (BoxedComplex*)complexMulComplex(rhs, div));
+    BoxedComplex* mod = (BoxedComplex*)complexSubComplex(lhs, (BoxedComplex*)autoDecref(complexMulComplex(rhs, div)));
     return mod;
 }
 

src/runtime/objmodel.cpp

@@ -1915,7 +1915,8 @@ Box* dataDescriptorInstanceSpecialCases(GetattrRewriteArgs* rewrite_args, BoxedS
                     RewriterVar::SmallVector normal_args;
                     RewriterVar::SmallVector float_args;
                     float_args.push_back(r_unboxed_val);
-                    RewriterVar* r_rtn = rewrite_args->rewriter->call(false, (void*)boxFloat, normal_args, float_args);
+                    RewriterVar* r_rtn = rewrite_args->rewriter->call(false, (void*)boxFloat, normal_args, float_args)
+                                             ->setType(RefType::OWNED);
                     rewrite_args->setReturn(r_rtn, ReturnConvention::HAS_RETURN);
                 }
 
@@ -7075,6 +7076,7 @@ extern "C" Box* boxedLocalsGet(Box* boxedLocals, BoxedString* attr, Box* globals
             if (!isSubclass(e.value->cls, KeyError)) {
                 throw e;
             }
+            e.clear();
         }
     }
 

test/tests/complex.py

-# expected: reffail
 # TODO repr is wrong, so for now, only printing complex numbers whose real
 # and imaginary parts are non-integers