Message: 5 Date: Mon, 29 Nov 2010 13:34:16 +0800 From: Kristj?n Valur J?nsson <[email protected]> To: The Stackless Python Mailing List <[email protected]> Subject: Re: [Stackless] Advice on Tracking down GC Assertion Failure Message-ID: <[email protected]> Content-Type: text/plain; charset="iso-8859-1"
>Hi, What this means is that the reference count of the target object is >too >low. One of your objects holds a reference to it without having >INCRefed it, >and also visits it during the gc_visit callback. >That is the most likely explanation. The other is that it is just a >general >reference mistake that accidentally shows up during GC. >Catch the target object and figure out what object it is, also take a look >at >from where it is being referenced. This ought to give you an idea >about it. >Use the debugger to examine "op" when the assertion fails. Thanks for the advice! Cheers, Andrew -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Francis Sent: Monday, November 29, 2010 5:17 To: [email protected] Subject: [Stackless] Advice on Tracking down GC Assertion Failure Hi Guys: I know that this is with my experimental version of Stackless Python with select() so it is a bit more difficult to track down. However I am getting a number of errors that result in the following: python: Modules/gcmodule.c:277: visit_decref: Assertion `gc->gc.gc_refs != 0' failed. Aborted In the past, Kevin and I tried various things to track down the error. I figure the problem revolves around not decrementing a reference count somewhere. Can anyone recommend a strategy for hunting this down? I have to admit that I am not as familiar with the C code base as Kevin was but now I am working on it. Cheers, Andrew P.S: here is output and a coding example that works with stackless.py STARTING MAIN DANCER starting 12 PRANCER starting 9 VIXEN starting 12 COMET starting 7 CUPID starting 6 DONER starting 10 DASHER starting 7 BLITZEN starting 11 RUDOLPH starting 9 A starting 2 B starting 4 C starting 4 D starting 6 E starting 8 F starting 2 G starting 4 H starting 7 python: Modules/gcmodule.c:277: visit_decref: Assertion `gc->gc.gc_refs != 0' failed. Aborted _______________________________________________ Stackless mailing list [email protected] http://www.stackless.com/mailman/listinfo/stackless
