On Thu, Dec 22, 2011 at 10:57:39AM +0100, Markus Klotzbuecher wrote: > On Thu, Dec 22, 2011 at 09:41:05AM +0100, Christian Kellermann wrote: > > * Markus Klotzbuecher <[email protected]> [111221 21:12]: > > > Dear All, > > > > > > I'm trying to use the cairo and sdl eggs for a small visualization > > > tool. One thing I would like to do is to use the mouse to move around > > > the current figure by clicking and holding it. However, I am getting > > > frequent segfaults after a few seconds of this moving around. The > > > crash happens both when running compiled and interpreted. Below an > > > slightly modified version of the test-cairo.scm from the cairo egg > > > that implements this "dragging" (I would have pasted it to > > > http://paste.call-cc.org/ , but the service seems down) > > > > > > Is anyone else using these eggs and has seen such problems? Does > > > anyone have a suggestions how to track this down? > > > > Yes, I am currently using it for a small doodle framework for easy > > visualisations and games. I haven't looked (yet) into mouse support. > > The SDL egg is rather dusty and there might be such dark corners. > > > > I will file this as a bug and will have a look at it during the > > holidays. > > Great, much appreciated! > > > If you find the time you could build a chicken with debugging > > information (add DEBUGBUILD=1 to the make call) and show be the > > backtrace of that. This might be of more help than the standard > > backtrace. > > Fine, i'll try to do that during the holidays!
The problem seems to be triggered by the use of text-extents. I uploaded a newer testcase to the bug report that makes heavier use of extents and also crashes almost immediately on my machine. I also added a backtraces from a CHICKEN built with DEBUGBUILD=1. Best regards Markus _______________________________________________ Chicken-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/chicken-users
