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Bug 3515

Summary: SDL_CreateWindow segfaults with SDL_VIDEODRIVER=dummy macOS Sierra
Product: SDL Reporter: Darren Kulp <darren>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: 2.0.5   
Hardware: x86_64   
OS: Mac OS X 10.11   
See Also: https://bugzilla.libsdl.org/show_bug.cgi?id=3061
Attachments: small.c

Description Darren Kulp 2016-12-10 18:36:57 UTC 
Created attachment 2649 [details]
small.c

Since bug 3061 was resolved, I can do SDL_Init() with SDL_VIDEODRIVER=dummy in my environment. Unfortunately, I crash now in SDL_CreateWindow().

Attached is a small testcase (small.c).

$ cc --version
Apple LLVM version 8.0.0 (clang-800.0.42.1)
Target: x86_64-apple-darwin16.1.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
$ sdl2-config --version
2.0.5
$ cc -g $(sdl2-config --libs --cflags) small.c -o small
$ ./small # default driver works, creates a window and exits
$ SDL_VIDEODRIVER=dummy ./small
Segmentation fault: 11

A backtrace in gdb is not helpful :

Thread 2 received signal SIGSEGV, Segmentation fault.
0x0000000100126aa0 in ?? ()
(gdb) where
#0  0x0000000100126aa0 in ?? ()
#1  0x00007fff5fbff660 in ?? ()
#2  0x00000001000be69c in ?? ()
#3  0x0000000000000000 in ?? ()

The Bugzilla database does not allow me to select Mac OS X 10.12 aka macOS Sierra. I do not know whether this bug is specific to OS version.
Comment 1 Sam Lantinga 2016-12-11 20:04:14 UTC 
Fixed, thanks!
https://hg.libsdl.org/SDL/rev/044ef09cda20