SF bug 578752: COUNT_ALLOCS vs heap types
Repair segfaults and infinite loops in COUNT_ALLOCS builds in the
presence of new-style (heap-allocated) classes/types.
Bugfix candidate. I'll backport this to 2.2. It's irrelevant in 2.1.
diff --git a/Misc/NEWS b/Misc/NEWS
index 2d323ea..7bc9817 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -294,6 +294,14 @@
Build
+- A bug was fixed that could cause COUNT_ALLOCS builds to segfault, or
+ get into infinite loops, when a new-style class got garbage-collected.
+ Unfortunately, to avoid this, the way COUNT_ALLOCS works requires
+ that new-style classes be immortal in COUNT_ALLOCS builds. Note that
+ COUNT_ALLOCS is not enabled by default, in either release or debug
+ builds, and that new-style classes are immortal only in COUNT_ALLOCS
+ builds.
+
- Compiling out the cyclic garbage collector is no longer an option.
The old symbol WITH_CYCLE_GC is now ignored, and Python.h arranges
that it's always defined (for the benefit of any extension modules