[Python-checkins] python/dist/src/Lib/test test_descr.py,1.144,1.145

2002年7月10日 23:56:09 -0700

Update of /cvsroot/python/python/dist/src/Lib/test
In directory usw-pr-cvs1:/tmp/cvs-serv30463/python/Lib/test
Modified Files:
	test_descr.py 
Log Message:
Added a test that provokes the hypothesized (in my last checkin comment)
debug-build failure when an instance of a new-style class is resurrected
by a __del__ method -- we simply never had any code that tried this.
This is already fixed in 2.3 CVS. In 2.2.1, it blows up via
 Fatal Python error: GC object already in linked list
I'll fix it in 2.2.1 CVS next.
Index: test_descr.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_descr.py,v
retrieving revision 1.144
retrieving revision 1.145
diff -C2 -d -r1.144 -r1.145
*** test_descr.py	24 Jun 2002 13:08:16 -0000	1.144
--- test_descr.py	11 Jul 2002 06:56:07 -0000	1.145
***************
*** 3184,3187 ****
--- 3184,3206 ----
 vereq(a, [2,3,1])
 
+ def subtype_resurrection():
+ if verbose:
+ print "Testing resurrection of new-style instance."
+ 
+ class C(object):
+ container = []
+ 
+ def __del__(self):
+ # resurrect the instance
+ C.container.append(self)
+ 
+ c = C()
+ c.attr = 42
+ # The only interesting thing here is whether this blows up in a
+ # debug build, due to flawed GC tracking logic in typeobject.c's
+ # call_finalizer() (a 2.2.1 bug).
+ del c
+ del C.container[-1] # resurrect it again for the heck of it
+ vereq(C.container[-1].attr, 42)
 
 def do_this_first():
***************
*** 3275,3278 ****
--- 3294,3298 ----
 copy_setstate()
 slices()
+ subtype_resurrection()
 if verbose: print "All OK"