Message 276006 - Python tracker

The change 51b635e81958 introduced memory leaks. Example:

$ ./python -m test -R 3:3 test_extcall
(...)
test_extcall leaked [102, 102, 102] references, sum=306
test_extcall leaked [41, 41, 41] memory blocks, sum=123

I'm analyzing the change to try to identify leaks.