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#4559: When a context manager's __exit__() method returns an object whose

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conversion to bool raises an exception, 'with' loses that exception.

Reviewed by Jeffrey Yasskin.
Already ported to 2.5, will port to 2.6 and 3.0
This commit is contained in:
Amaury Forgeot d'Arc
2008-12-10 23:22:49 +00:00
parent ffd42cf444
commit ad9b5992e3
3 changed files with 46 additions and 6 deletions
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19
Python/ceval.c
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@@ -2349,11 +2349,20 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
/* XXX Not the fastest way to call it... */
x = PyObject_CallFunctionObjArgs(exit_func, u, v, w,
NULL);
if (x == NULL) {
Py_DECREF(exit_func);
Py_DECREF(exit_func);
if (x == NULL)
break; /* Go to error exit */
}
if (u != Py_None && PyObject_IsTrue(x)) {
if (u != Py_None)
err = PyObject_IsTrue(x);
else
err = 0;
Py_DECREF(x);
if (err < 0)
break; /* Go to error exit */
else if (err > 0) {
err = 0;
/* There was an exception and a true return */
STACKADJ(-2);
Py_INCREF(Py_None);
@@ -2365,8 +2374,6 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
/* The stack was rearranged to remove EXIT
above. Let END_FINALLY do its thing */
}
Py_DECREF(x);
Py_DECREF(exit_func);
PREDICT(END_FINALLY);
break;
}