PyFrame_GetGlobals: Don't return a copy of the globals

_warnings is modifying it

from_cpython/Python/_warnings.c

@@ -472,7 +472,8 @@ setup_context(Py_ssize_t stack_level, PyObject **filename, int *lineno,
 
     /* Setup registry. */
     assert(globals != NULL);
-    assert(PyDict_Check(globals));
+    // Pyston change: PyFrame_GetGlobals returns a attrwrapper object not a real dict
+    // assert(PyDict_Check(globals));
     *registry = PyDict_GetItemString(globals, "__warningregistry__");
     if (*registry == NULL) {
         int rc;

src/runtime/frame.cpp

@@ -163,10 +163,7 @@ extern "C" int PyFrame_GetLineNumber(PyFrameObject* _f) noexcept {
 }
 
 extern "C" PyObject* PyFrame_GetGlobals(PyFrameObject* f) noexcept {
-    Box* globals = BoxedFrame::globals((Box*)f, NULL);
-    if (globals->cls == attrwrapper_cls)
-        return attrwrapperToDict(globals);
-    return globals;
+    return BoxedFrame::globals((Box*)f, NULL);
 }
 
 extern "C" PyFrameObject* PyFrame_ForStackLevel(int stack_level) noexcept {

test/tests/warnings_test.py

 import warnings
 import _warnings
 
+print "__warningregistry__" in globals()
+
 warnings.filterwarnings('error')
 
 try:
@@ -12,3 +14,5 @@ try:
     _warnings.warn("deperecated", Warning)
 except Warning as w:
     print(w.args[0])
+
+print "__warningregistry__" in globals()