Message101656
sys.setfilesystemencoding() doesn't check if the argument is a valid encoding name.
If the filesystem encoding is invalid, open("a") goes into an unlimited loop. The default recursion limit is 1000, but the example crash at 930: too bad :-) Each loop allocate ~9000 bytes: Linux creates a 8 MB stack by default, and so ~9000x930 uses all the stack.
Using a lower recursion limit, we can see the loop:
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$ ./python -c 'import sys; sys.setrecursionlimit(30); sys.setfilesystemencoding("xxx"); open("x")'
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 98, in search_function
level=0)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 83, in search_function
norm_encoding = normalize_encoding(encoding)
File "/home/SHARE/SVN/py3k/Lib/encodings/__init__.py", line 55, in normalize_encoding
if isinstance(encoding, bytes):
RuntimeError: maximum recursion depth exceeded while calling a Python object
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Date |
User |
Action |
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2010-03-24 23:05:54 | vstinner | set | recipients:
+ vstinner |
2010-03-24 23:05:54 | vstinner | set | messageid: <1269471954.9.0.33641527211.issue8226@psf.upfronthosting.co.za> |
2010-03-24 23:05:53 | vstinner | link | issue8226 messages |
2010-03-24 23:05:52 | vstinner | create | |
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