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Bug 1238

Summary: SDL_SetKeyboardFocus may send events to already destroyed windows
Product: SDL Reporter: bastien.bouclet
Component: eventsAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 2.0   
Hardware: All   
OS: Linux   

Description bastien.bouclet 2011-06-26 02:15:36 UTC 
SDL_Keyboard::focus does not seem to be reset when the window that has focus is destroyed, resulting in the following crash :

#0  X11_SetWindowGammaRamp (_this=0x8ed9cb0, window=0x91f25c0, ramp=0x0) at src/video/x11/SDL_x11window.c:948
#1  0x001bd15e in SDL_OnWindowFocusLost (window=0x91f25c0) at src/video/SDL_video.c:1900
#2  0x00168a2e in SDL_SendWindowEvent (window=0x91f25c0, windowevent=<value optimized out>, data1=0, data2=0)
    at src/events/SDL_windowevents.c:157
#3  0x00166454 in SDL_SetKeyboardFocus (window=0x9678a08) at src/events/SDL_keyboard.c:612
#4  0x001c9547 in X11_DispatchEvent (_this=0x8ed9cb0) at src/video/x11/SDL_x11events.c:190
#5  X11_PumpEvents (_this=0x8ed9cb0) at src/video/x11/SDL_x11events.c:542
#6  0x00163f24 in SDL_PumpEvents () at src/events/SDL_events.c:302
#7  0x0016438a in SDL_WaitEventTimeout (event=0xbfffe15c, timeout=0) at src/events/SDL_events.c:335
#8  0x00164465 in SDL_PollEvent (event=0xbfffe15c) at src/events/SDL_events.c:317
#9  0x089975d3 in SdlEventSource::pollEvent (this=0x8ec2a58, event=...) at backends/events/sdl/sdl-events.cpp:209

SDL_SetKeyboardFocus looks like it can call SDL_SendWindowEvent for an already destroyed window.
Comment 1 Sam Lantinga 2012-01-13 22:38:50 UTC 
Fixed, thanks!
http://hg.libsdl.org/SDL/rev/b1a71f8189a6