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Issue #26020: Fix evaluation order for set literals

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This commit is contained in:
Raymond Hettinger 2016-09-08 14:40:36 -07:00
parent 5dc504c3c9
commit 262b6793e0
3 changed files with 21 additions and 2 deletions
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6
Python/ceval.c
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@ -2580,14 +2580,16 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
TARGET(BUILD_SET) {
PyObject *set = PySet_New(NULL);
int err = 0;
int i;
if (set == NULL)
goto error;
while (--oparg >= 0) {
PyObject *item = POP();
for (i = oparg; i > 0; i--) {
PyObject *item = PEEK(i);
if (err == 0)
err = PySet_Add(set, item);
Py_DECREF(item);
}
STACKADJ(-oparg);
if (err != 0) {
Py_DECREF(set);
goto error;