Update of /cvsroot/python/python/dist/src/Misc In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv2582/Misc Modified Files: Tag: release23-maint NEWS Log Message: SF 1055820: weakref callback vs gc vs threads In cyclic gc, clear all weakrefs to unreachable objects before allowing any Python code (weakref callbacks or __del__ methods) to run. This is a critical bugfix, affecting all versions of Python since weakrefs were introduced. Index: NEWS =================================================================== RCS file: /cvsroot/python/python/dist/src/Misc/NEWS,v retrieving revision 1.831.4.156 retrieving revision 1.831.4.157 diff -u -d -r1.831.4.156 -r1.831.4.157 --- NEWS 20 Oct 2004 11:55:54 -0000 1.831.4.156 +++ NEWS 31 Oct 2004 00:13:05 -0000 1.831.4.157 @@ -12,6 +12,17 @@ Core and builtins ----------------- +- Bug #1055820 Cyclic garbage collection was not protecting against that + calling a live weakref to a piece of cyclic trash could resurrect an + insane mutation of the trash if any Python code ran during gc (via + running a dead object's __del__ method, running another callback on a + weakref to a dead object, or via any Python code run in any other thread + that managed to obtain the GIL while a __del__ or callback was running + in the thread doing gc). The most likely symptom was "impossible" + ``AttributeEror`` exceptions, appearing seemingly at random, on weakly + referenced objects. The cure was to clear all weakrefs to unreachable + objects before allowing any callbacks to run. + - Bug #951851: Python crashed when reading import table of certain Windows DLLs @@ -88,7 +99,7 @@ - Bug #679953: zipfile can now handle file sizes over 2 GB. Previously the compressed and uncompressed file sizes were being stored as signed longs instead of unsigned as the ZIP spec specifies. - + - Bug #981530: Fix UnboundLocalError in shutil.rmtree(). This affects the documented behavior: the function passed to the onerror() handler can now also be os.listdir. @@ -134,7 +145,7 @@ - Bug #1034496: Use -h instead of -soname for Solaris compatibility. -- Patch #973204: Use -rpath instead of -R for runtime_library_dirs +- Patch #973204: Use -rpath instead of -R for runtime_library_dirs on Irix and True64. - Bug #978645: Modules/getpath.c now builds properly under --disable-framework