[Python-Dev] collections module

Jeff Epler jepler at unpythonic.net
Tue Jan 13 15:53:00 EST 2004


On Tue, Jan 13, 2004 at 01:53:31PM -0600, Jeff Epler wrote:
> I also got the same (?) failure as tim described:
> test_list
> make: *** [test] Segmentation fault

test_sort (test.test_list.ListTest) ... ==32746== 
==32746== Invalid write of size 4
==32746==    at 0x806A855: ins1 (listobject.c:175)
==32746==    by 0x806B144: listappend (listobject.c:637)
==32746==    by 0x80A5928: call_function (ceval.c:3440)
==32746==    by 0x80A3F16: eval_frame (ceval.c:2127)
==32746==    Address 0x41302B2C is 0 bytes inside a block of size 1 alloc'd
==32746==    at 0x40160DB8: malloc (in /usr/lib/valgrind/valgrind.so)
==32746==    by 0x806B50E: listsort (listobject.c:1884)
==32746==    by 0x80EEF07: PyCFunction_Call (methodobject.c:118)
==32746==    by 0x805AAD3: PyObject_Call (abstract.c:1759)

It's in the self-modifying list test:
    z = range(12)
    def c(x, y):
        z.append(1) # HERE
        return cmp(x, y)
    z.sort(c)

Jeff



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