https://bugs.kde.org/show_bug.cgi?id=496736
Bug ID: 496736
Summary: KWin X11 memory leak after exiting a program written
with SDL
Classification: Plasma
Product: kwin
Version: 6.2.3
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: generic-crash
Assignee: kwin-bugs-n...@kde.org
Reporter: emberqua...@gmail.com
Target Milestone: ---
Created attachment 176159
--> https://bugs.kde.org/attachment.cgi?id=176159&action=edit
Minimal SDL2 example code
SUMMARY
Every time I close my program written in C++ with SDL, KWin (the KDE window
manager) leaks memory, anywhere from 1 to 10 MB at a time. After about 1 GB has
leaked, KWin starts to get unstable, and it crashes soon thereafter.
STEPS TO REPRODUCE
1. Run "g++ -lSDL2 sdl2.cpp" to compile the attached C++ code, which is a
minimal SDL3 app
2. Run the compiled program and then close it
OBSERVED RESULT
KWin leaks memory, eventually to the point of a crash.
EXPECTED RESULT
It shouldn't leak memory.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8.0
Qt Version: 6.8.0
Kernel Version: 6.12.1-zen1-1-zen (64-bit)
Graphics Platform: X11
Processors: 20 × 13th Gen Intel® Core™ i9-13900H
Memory: 31.0 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
ADDITIONAL INFORMATION
This issue happens with both SDL2 and SDL3.
I often see the following error in the console after closing the program:
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 40 (X_TranslateCoords)
Resource id in failed request: 0x7e171fc
Serial number of failed request: 560
Current serial number in output stream: 560
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