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Issue 4597: Fix several cases in EvalFrameEx where an exception could be 

"raised" without setting x, err, or why to let the eval loop know.
This commit is contained in:
Jeffrey Yasskin 2008-12-08 18:55:24 +00:00
parent b5120ceae2
commit 2d873bd68b
2 changed files with 28 additions and 3 deletions
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14
Lib/test/test_file.py
View File

@ -531,6 +531,20 @@ class StdoutTests(unittest.TestCase):
finally:
sys.stdout = save_stdout
def test_del_stdout_before_print(self):
# Issue 4597: 'print' with no argument wasn't reporting when
# sys.stdout was deleted.
save_stdout = sys.stdout
del sys.stdout
try:
print
except RuntimeError as e:
self.assertEquals(str(e), "lost sys.stdout")
else:
self.fail("Expected RuntimeError")
finally:
sys.stdout = save_stdout
def test_main():
# Historically, these tests have been sloppy about removing TESTFN.

17
Python/ceval.c
View File

@ -1049,6 +1049,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
}
Py_FatalError("invalid argument to DUP_TOPX"
" (bytecode corruption?)");
/* Never returns, so don't bother to set why. */
break;
case UNARY_POSITIVE:
@ -1642,9 +1643,11 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
case PRINT_NEWLINE:
if (stream == NULL || stream == Py_None) {
w = PySys_GetObject("stdout");
if (w == NULL)
if (w == NULL) {
PyErr_SetString(PyExc_RuntimeError,
"lost sys.stdout");
why = WHY_EXCEPTION;
}
}
if (w != NULL) {
/* w.write() may replace sys.stdout, so we
@ -1870,6 +1873,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
PyErr_Format(PyExc_SystemError,
"no locals when loading %s",
PyObject_REPR(w));
why = WHY_EXCEPTION;
break;
}
if (PyDict_CheckExact(v)) {
@ -2459,7 +2463,10 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
Py_DECREF(v);
if (x != NULL) {
v = POP();
err = PyFunction_SetClosure(x, v);
if (PyFunction_SetClosure(x, v) != 0) {
/* Can't happen unless bytecode is corrupt. */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
}
if (x != NULL && oparg > 0) {
@ -2473,7 +2480,11 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
w = POP();
PyTuple_SET_ITEM(v, oparg, w);
}
err = PyFunction_SetDefaults(x, v);
if (PyFunction_SetDefaults(x, v) != 0) {
/* Can't happen unless
PyFunction_SetDefaults changes. */
why = WHY_EXCEPTION;
}
Py_DECREF(v);
}
PUSH(x);