Fix a couple bool issues

src/runtime/bool.cpp

@@ -27,7 +27,7 @@ extern "C" PyObject* PyBool_FromLong(long n) noexcept {
 }
 
 extern "C" Box* boolNonzero(BoxedBool* v) {
-    return v;
+    return incref(v);
 }
 
 extern "C" Box* boolRepr(BoxedBool* v) {

src/runtime/types.cpp

@@ -4255,7 +4255,7 @@ void setupRuntime() {
     attrwrapper_cls->tp_mro = BoxedTuple::create({ attrwrapper_cls, object_cls });
     dict_cls->tp_mro = BoxedTuple::create({ dict_cls, object_cls });
     int_cls->tp_mro = BoxedTuple::create({ int_cls, object_cls });
-    bool_cls->tp_mro = BoxedTuple::create({ bool_cls, object_cls });
+    bool_cls->tp_mro = BoxedTuple::create({ bool_cls, int_cls, object_cls });
     complex_cls->tp_mro = BoxedTuple::create({ complex_cls, object_cls });
     long_cls->tp_mro = BoxedTuple::create({ long_cls, object_cls });
     float_cls->tp_mro = BoxedTuple::create({ float_cls, object_cls });

test/tests/bool_functions.py

-# expected: reffail
 # Regression test: we rely internally on CompilerType.nonzero() always returning a BOOL,
 # in at least these two cases.
 

test/tests/bool_passing.py

-# expected: reffail
 # Test that we can pass known-bool values through OSRs and what not:
 
 def f(b):