sdl version?

Does it happen with the 0.73 release sources as well?

The libsdl1.2-dev package is version 1.2.13-4ubuntu4; sdl-config --version just gives 1.2.13

Yes, the bug happens with the 0.73 release sources as well.

It happens only with at least gcc/g++ -O1 though; at gcc -O0 it works.

Also it happens only if fullscreen=true is in the conf file, not if you switch to fullscreen manually after DOSBox is already running.

I'm at a loss on how to run gdb on this. I mean I can run it, but then the screen just goes black and I have to "killall -9 dosbox" from a virtual console; after that of course I can't do any "bt full", "disass" or anything else in gdb any more because the memory is gone. The only info that I can give you is the error location:

0x0000000000529132 in RENDER_EndUpdate () at render.cpp:224
render.frameskip.hadSkip[render.frameskip.index] = 0;

I should add: this is the 64-bit Ubuntu. I'll attach my whole conf file as well. Please tell me what else you would need (valgrind, how to run gdb on this and what to do in it; etc.)

the location can technically cause a segfault. So the location might be a valid one.

Try this
open a xterminal and type echo $DISPLAY
Note down the answer
switch to a terminal (with ctrl-alt-f1 )
login
export DISPLAY= that number your wrote down
start gdb dosbox
run

not sure if it will crash at the same location though. At my place this seems to trigger crash in SDL_Init. so probably not the same thing as you.

It did crash at the same location.

gdb output attached.

Note: this is the 0.73 release.

Just FYI, this bug has disappeared. I didn't look closely at the newest changes in CVS, or in the Ubuntu Karmic packages, but it seems to be gone now. Thanks a lot. to whoever is responsible.

Could you please see if yesterday's (or friday's whatever) cvs sources exhibit the problem?