[Pyrex] Re: Problems with pyrex and glib

[Toby]

Drirr wrote:
> *** glibc detected *** double free or corruption (!prev): 0x08058630 ***
> Aborted

It's not related to glib.  It happens in a standalone build too:

	pyrexc realbase.pyx
	gcc -fPIC -I/usr/include/python2.4/ -c realbase.c -o realbase.o
	gcc realbase.o -shared -o realbase.so

The culprit is calling Python stuff from __dealloc__.  Quoting Greg:

	You need to be careful what you do in a __dealloc__ method.
	[...] you should avoid invoking any Python operations [...] 
	It's best if you stick to just deallocating C data.

In fact, taking Python operations (such as print and the chain of stuff
called from print) out of __dealloc__ seems to solve the problem:

	cdef extern int puts(char* s)

	cdef class Container:
	   def __init__(self):
	       print "Init"

	   def __dealloc__(self):
	       puts("Dealloc")

	global_context = Container()


Toby

-- 
Pascal is for building pyramids—imposing, breathtaking structures
built by armies pushing heavy blocks into place.
Lisp is for building organisms . . .		—Alan Perlis