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bpo-35742: Fix test_envar_unimportable in test_builtin. #11561

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Merged
merged 1 commit into from
Jan 15, 2019
Merged

bpo-35742: Fix test_envar_unimportable in test_builtin. #11561

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1 change: 1 addition & 0 deletions Lib/test/test_builtin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1608,6 +1608,7 @@ def test_envar_good_path_empty_string(self):
def test_envar_unimportable(self):
for envar in (
'.', '..', '.foo', 'foo.', '.int', 'int.',
'.foo.bar', '..foo.bar', '/./',
'nosuchbuiltin',
'nosuchmodule.nosuchcallable',
):
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25 changes: 15 additions & 10 deletions Python/sysmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -141,11 +141,14 @@ sys_breakpointhook(PyObject *self, PyObject *const *args, Py_ssize_t nargs, PyOb
modulepath = PyUnicode_FromString("builtins");
attrname = envar;
}
else {
else if (last_dot != envar) {
/* Split on the last dot; */
modulepath = PyUnicode_FromStringAndSize(envar, last_dot - envar);
attrname = last_dot + 1;
}
else {
goto warn;
}
if (modulepath == NULL) {
PyMem_RawFree(envar);
return NULL;
Expand All @@ -155,27 +158,29 @@ sys_breakpointhook(PyObject *self, PyObject *const *args, Py_ssize_t nargs, PyOb
Py_DECREF(modulepath);

if (module == NULL) {
goto error;
if (PyErr_ExceptionMatches(PyExc_ImportError)) {
goto warn;
}
PyMem_RawFree(envar);
return NULL;
}

PyObject *hook = PyObject_GetAttrString(module, attrname);
Py_DECREF(module);

if (hook == NULL) {
goto error;
if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
goto warn;
}
PyMem_RawFree(envar);
return NULL;
}
PyMem_RawFree(envar);
PyObject *retval = _PyObject_FastCallKeywords(hook, args, nargs, keywords);
Py_DECREF(hook);
return retval;

error:
if (!PyErr_ExceptionMatches(PyExc_ImportError)
&& !PyErr_ExceptionMatches(PyExc_AttributeError))
{
PyMem_RawFree(envar);
return NULL;
}
warn:
/* If any of the imports went wrong, then warn and ignore. */
PyErr_Clear();
int status = PyErr_WarnFormat(
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