On Tue, Nov 20, 2007 at 03:18:03PM -0800, Gregory Propf wrote: > I've written a small program using the gtk2hs library and it crashes at > unpredictable times with X windows errors like the one below. I looked for > the messages online and found various people talking about buggy gtk > libraries but no clear solutions. I don't know a lot about X windows or what > these errors mean. Has anyone else had this problem or know what to do? The > program is a simple implementation of the Conway Life game. It doesn't have > very much going on except that the main window is an animation showing the > evolution of the game. I tried running with the --sync option as it said and > you get an almost immediate error like "Xlib: unexpected async reply > (sequence 0x1652)!". Even these are not predictable and often come after > several screen updates. I'm using the Gtk.timeoutAddFull function to do the > animation. Note that the error_code, request_code, etc.. changes with each > crash. It's as though it picks a random error code each time. I've compiled > with both > ghc 6.4.2 and 6.6.1 and gtk2hs 0.9.12 and 0.9.12.1. I've tried various > combinations of -O flags as well. Same problem every time. > > A typical crash message > ----------------------------------------------------------------------- > The program 'hlh' received an X Window System error. > This probably reflects a bug in the program. > The error was 'BadDrawable (invalid Pixmap or Window parameter)'. > (Details: serial 236321 error_code 9 request_code 62 minor_code 0) > (Note to programmers: normally, X errors are reported asynchronously; > that is, you will receive the error a while after causing it. > To debug your program, run it with the --sync command line > option to change this behavior. You can then get a meaningful > backtrace from your debugger if you break on the gdk_x_error() function.)
What happens if you run 'gdb ./hlh', 'b gdk_x_error', 'run --sync' ? (Are the backtraces consistent?) Stefan
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