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bpo-1514420: Do not attempt to open files with names in <>s when formatting an exception (GH-28143)

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Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>
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Irit Katriel 2021-09-20 16:10:30 +01:00 • committed by GitHub
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commit f71300cb04
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1
Misc/NEWS.d/next/Core and Builtins/2021-09-03-16-18-10.bpo-1514420.2Lumpj.rst Normal file
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@ -0,0 +1 @@
Interpreter no longer attempts to open files with names in angle brackets (like "<string>" or "<stdin>") when formatting an exception.

9
Python/traceback.c
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@ -396,6 +396,15 @@ _Py_DisplaySourceLine(PyObject *f, PyObject *filename, int lineno, int indent, i
if (filename == NULL)
return 0;
/* Do not attempt to open things like <string> or <stdin> */
assert(PyUnicode_Check(filename));
if (PyUnicode_READ_CHAR(filename, 0) == '<') {
Py_ssize_t len = PyUnicode_GET_LENGTH(filename);
if (len > 0 && PyUnicode_READ_CHAR(filename, len - 1) == '>') {
return 0;
}
}
io = PyImport_ImportModuleNoBlock("io");
if (io == NULL)
return -1;