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gh-122170: Fix interpreter exiting due to ValueError from os.stat for too long filename on Windows #122175

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devdanzin
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@devdanzin devdanzin commented Jul 23, 2024

This PR fixes the interpreter exiting on Windows in 3.13.0b4 and main due to ValueError: stat: path too long for Windows being raised by os.stat() in updatecache() in linecache.py when trying to print a traceback with a too long filename.

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checkcache is may also be subject to the same issue (it calls os.stat).

You can pick what I wrote here: 405a921

@@ -98,7 +98,7 @@ def updatecache(filename, module_globals=None):
fullname = filename
try:
stat = os.stat(fullname)
except OSError:
except (OSError, ValueError):
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This one should not be suppressed on Unix platforms.

@@ -280,6 +280,10 @@ def test_loader(self):
self.assertEqual(linecache.getlines(filename, module_globals),
['source for x.y.z\n'])

@unittest.skipUnless(support.MS_WINDOWS, "Test only relevant in Windows.")
def test_filename_too_long(self):
self.assertEqual(linecache.updatecache("s" * 999999), [])
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Also check checkcache (which I forgot on my branch).

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Closing due to @picnixz's version being more complete and polished, thanks!

@devdanzin devdanzin closed this Jul 23, 2024
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2 participants