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Fix issue 26287: While handling FORMAT_VALUE opcode, the top of stack was being corrupted if an error occurred in PyObject_Format().

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This commit is contained in:
Eric V. Smith 2016-02-05 18:23:08 -05:00
parent a3643c280f
commit 135d5f49f6
2 changed files with 13 additions and 2 deletions
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11
Lib/test/test_fstring.py
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@ -692,6 +692,17 @@ def test_invalid_expressions(self):
r"f'{a(4]}'", r"f'{a(4]}'",
]) ])
def test_errors(self):
# see issue 26287
self.assertAllRaise(TypeError, 'non-empty',
[r"f'{(lambda: 0):x}'",
r"f'{(0,):x}'",
])
self.assertAllRaise(ValueError, 'Unknown format code',
[r"f'{1000:j}'",
r"f'{1000:j}'",
])
def test_loop(self): def test_loop(self):
for i in range(1000): for i in range(1000):
self.assertEqual(f'i:{i}', 'i:' + str(i)) self.assertEqual(f'i:{i}', 'i:' + str(i))

4
Python/ceval.c
View file

@ -3383,7 +3383,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
int have_fmt_spec = (oparg & FVS_MASK) == FVS_HAVE_SPEC; int have_fmt_spec = (oparg & FVS_MASK) == FVS_HAVE_SPEC;
fmt_spec = have_fmt_spec ? POP() : NULL; fmt_spec = have_fmt_spec ? POP() : NULL;
value = TOP(); value = POP();
/* See if any conversion is specified. */ /* See if any conversion is specified. */
switch (which_conversion) { switch (which_conversion) {
@ -3426,7 +3426,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
goto error; goto error;
} }
SET_TOP(result); PUSH(result);
DISPATCH(); DISPATCH();
} }