[Python-checkins] r85574 - in python/branches/release27-maint: Lib/test/test_file2k.py Misc/NEWS Objects/fileobject.c
benjamin.peterson
python-checkins at python.org
Sat Oct 16 21:20:12 CEST 2010
Author: benjamin.peterson
Date: Sat Oct 16 21:20:12 2010
New Revision: 85574
Log:
iterators passed to writelines() can close their files; don't segfault #10125
Modified:
python/branches/release27-maint/Lib/test/test_file2k.py
python/branches/release27-maint/Misc/NEWS
python/branches/release27-maint/Objects/fileobject.c
Modified: python/branches/release27-maint/Lib/test/test_file2k.py
==============================================================================
--- python/branches/release27-maint/Lib/test/test_file2k.py (original)
+++ python/branches/release27-maint/Lib/test/test_file2k.py Sat Oct 16 21:20:12 2010
@@ -135,6 +135,14 @@
def testReadWhenWriting(self):
self.assertRaises(IOError, self.f.read)
+ def testNastyWritelinesGenerator(self):
+ def nasty():
+ for i in range(5):
+ if i == 3:
+ self.f.close()
+ yield str(i)
+ self.assertRaises(ValueError, self.f.writelines, nasty())
+
def testIssue5677(self):
# Remark: Do not perform more than one test per open file,
# since that does NOT catch the readline error on Windows.
Modified: python/branches/release27-maint/Misc/NEWS
==============================================================================
--- python/branches/release27-maint/Misc/NEWS (original)
+++ python/branches/release27-maint/Misc/NEWS Sat Oct 16 21:20:12 2010
@@ -10,6 +10,9 @@
Core and Builtins
-----------------
+- Issue #10125: Don't segfault when the iterator passed to ``file.writelines()``
+ closes the file.
+
- Issue #9997: Don't let the name "top" have special significance in scope
resolution.
Modified: python/branches/release27-maint/Objects/fileobject.c
==============================================================================
--- python/branches/release27-maint/Objects/fileobject.c (original)
+++ python/branches/release27-maint/Objects/fileobject.c Sat Oct 16 21:20:12 2010
@@ -1849,6 +1849,11 @@
}
PyList_SetItem(list, j, line);
}
+ /* The iterator might have closed the file on us. */
+ if (f->f_fp == NULL) {
+ err_closed();
+ goto error;
+ }
}
if (j == 0)
break;
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