New submission from danielen <[email protected]>:
The following code results in a segmentation fault in CPython 3.8 while
executes fines (raises a SystemError) in CPython 3.7.
PyObject* debug(PyObject *self, PyObject *args)
{
const char * debug = "debug";
PyErr_SetString(PyExc_ValueError, "debug!");
return Py_BuildValue("(s#O)", debug, strlen(debug), Py_None);
}
It seems necessary for the format string to contain both an instance of "s#"
and "O" to trigger the bug.
I'm attaching a C module that reproduces the problem.
----------
components: Extension Modules
files: module.c
messages: 357485
nosy: danielen
priority: normal
severity: normal
status: open
title: Py_BuildValue("(s#O)", ...) segfaults if entered with exception raised
versions: Python 3.8
Added file: https://bugs.python.org/file48743/module.c
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