Issue python#112: Prepare Stackless 3.5, fix PEP492 for Stackless

Fix various issues introduced by merging the PEP 492 implementation from default.

https://bitbucket.org/stackless-dev/stackless/issues/112

Author: Anselm Kruis

Objects/genobject.c

@@ -422,13 +422,18 @@ gen_throw(PyGenObject *gen, PyObject *args)
 static PyObject *
 gen_iternext(PyGenObject *gen)
 {
+    STACKLESS_GETARG();
+    PyObject *retval;
     if (((PyCodeObject*)gen->gi_code)->co_flags & CO_COROUTINE) {
         PyErr_SetString(PyExc_TypeError,
                         "coroutine-objects do not support iteration");
         return NULL;
     }
 
-    return gen_send_ex(gen, NULL, 0);
+    STACKLESS_PROMOTE_ALL();
+    retval = gen_send_ex(gen, NULL, 0);
+    STACKLESS_ASSERT();
+    return retval;
 }
 
 /*

Objects/typeobject.c

@@ -6485,6 +6485,7 @@ slot_tp_finalize(PyObject *self)
 static PyObject *
 slot_am_await(PyObject *self)
 {
+    STACKLESS_GETARG(); /* not supported */
     PyObject *func, *res;
     _Py_IDENTIFIER(__await__);
 
@@ -6503,6 +6504,7 @@ slot_am_await(PyObject *self)
 static PyObject *
 slot_am_aiter(PyObject *self)
 {
+    STACKLESS_GETARG(); /* not supported */
     PyObject *func, *res;
     _Py_IDENTIFIER(__aiter__);
 
@@ -6521,6 +6523,7 @@ slot_am_aiter(PyObject *self)
 static PyObject *
 slot_am_anext(PyObject *self)
 {
+    STACKLESS_GETARG(); /* not supported */
     PyObject *func, *res;
     _Py_IDENTIFIER(__anext__);
 

Python/ceval.c

@@ -7,7 +7,7 @@
    */
 
 /* enable more aggressive intra-module optimizations, where available */
-#define PY_LOCAL_AGGRESSIVE
+#undef PY_LOCAL_AGGRESSIVE
 
 #include "Python.h"
 
@@ -1772,28 +1772,20 @@ slp_eval_frame_value(PyFrameObject *f, int throwflag, PyObject *retval)
             }
         }
         else if (f->f_execute == slp_eval_frame_with_cleanup) {
-            /* finalise the WITH_CLEANUP operation */
-
+            /* finalise the WITH_CLEANUP_START operation */
             if (retval) {
-                PyObject *u = TOP();
-                int err;
-                if (u != Py_None)
-                    err = PyObject_IsTrue(retval);
-                else
-                    err = 0;
-                Py_DECREF(retval);
-
-                if (err > 0) {
-                    err = 0;
-                    /* There was an exception and a True return */
-                    PUSH(PyLong_FromLong((long) WHY_SILENCED));
-                }
-                /* XXX: The main loop contains a PREDICT(END_FINALLY).
+                /* recompute exc */
+                PyObject *exc = TOP();
+                if (PyLong_Check(exc))
+                    exc = Py_None;
+                PUSH(exc);
+                PUSH(retval);
+                /* XXX: The main loop contains a PREDICT(WITH_CLEANUP_FINISH);
                  * I wonder, if we must use it here?
                  * If so, then set f_execute too.
                  */
                 /*f->f_execute = PyEval_EvalFrame_value;
-                PREDICT(END_FINALLY); */
+                PREDICT(WITH_CLEANUP_FINISH); */
             }
         }
         else {

Stackless/core/stacklesseval.c

@@ -1122,7 +1122,7 @@ gen_iternext_callback(PyFrameObject *f, int exc, PyObject *result)
          * a leaking StopIteration into RuntimeError (with its cause
          * set appropriately). */
         if ((((PyCodeObject *)gen->gi_code)->co_flags &
-                                                CO_FUTURE_GENERATOR_STOP)
+            (CO_FUTURE_GENERATOR_STOP | CO_COROUTINE | CO_ITERABLE_COROUTINE))
             && PyErr_ExceptionMatches(PyExc_StopIteration))
         {
             PyObject *exc, *val, *val2, *tb;