Hi

On 2018-02-19 07:38:53, Marco Bodrato wrote:
> Ciao,
> 
> Il Dom, 18 Febbraio 2018 10:09 pm, Sebastian Ramacher ha scritto:
> > See https://wiki.debian.org/HowToGetABacktrace for details. you'll need to
> > add debian-debug mirrors to your sources.list.
> 
> Thanks for the helpful and quick answer!

Thanks. Could you please go to https://trac.videolan.org/vlc, create a bug, add
the backtrace and the output of vlc -vvv up to the point of the crash? Thanks!

> 
> After
> # apt-get install vlc-bin-dbgsym vlc-plugin-video-output-dbgsym
> libvlccore9-dbgsym
> 
> I did re-run gdb vlc as in the previous session. And when starting a video
> I get:
> Thread 23 "vlc" received signal SIGSEGV, Segmentation fault.
> 
> The full backtrace follows:
> 
> (gdb) bt full
> #0  0x0000000000000000 in ?? ()
> No symbol table info available.
> #1  0x00007fff8247a648 in GetDisplayEXT (attrs=0x7fff881a45a0,
> dpy=0x7fffc4c96e30, plat=12757) at video_output/opengl/egl.c:177
>         getDisplay = <optimized out>
> #2  Open (obj=0x7fffc4c11a60, api=0x7fff8247ada0 <api>) at
> video_output/opengl/egl.c:273
>         attrs = {12758, 0, 12344}
>         gl = 0x7fffc4c11a60
>         sys = 0x7fffc4c0d3e0
>         wnd = 0x7fff7c260860
>         createSurface = 0x7fff8247a0c0 <CreateWindowSurface>
>         window = 0x7fff7c260890
>         snum = 0
>         major = 1433888944
>         minor = 21845
>         __func__ = "Open"
>         ext = <optimized out>
>         conf_attr = {12758, 0, 12344, 32767, -2109233184, 32767,
> -2011543840, 32767, -993977760}
>         cfgv = {0x5555557766c0}
>         cfgc = 0
>         ctx = <optimized out>
> #3  0x00007ffff70f6d13 in module_load (obj=obj@entry=0x7fffc4c11a60,
> init=init@entry=0x7ffff70f6c60 <generic_start>,
> args=args@entry=0x7fff881a46c8, m=<optimized out>, m=<optimized out>) at
> modules/modules.c:183
>         ap = {{gp_offset = 48, fp_offset = 48, overflow_arg_area =
> 0x7fff881a4800, reg_save_area = 0x7fff881a4710}}
>         ret = 0
> #4  0x00007ffff70f727a in vlc_module_load (obj=obj@entry=0x7fffc4c11a60,
> capability=capability@entry=0x7ffff71a7397 "opengl", name=0x7ffff7197337
> "", name@entry=0x7fff831e3ea5 "$gl", strict=strict@entry=true,
> probe=probe@entry=0x7ffff70f6c60 <generic_start>) at modules/modules.c:279
>         cand = 0x555555776740
>         ret = <optimized out>
>         i = 1
>         buf =
> "any\000\377\177\000\000P-$|\026\000\000\000`l\017\367\377\177\000\000\361\245\025\367\377\177\000"
>         slen = <optimized out>
>         shortcut = 0x7fff881a46e0 "any"
>         var = 0x0
>         mods = 0x7fffc4c02150
>         total = 3
>         __func__ = "vlc_module_load"
>         module = 0x0
>         b_force_backup = false
>         args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area =
> 0x7fff881a4800, reg_save_area = 0x7fff881a4710}}
> #5  0x00007ffff70f77d4 in module_need (obj=obj@entry=0x7fffc4c11a60,
> cap=cap@entry=0x7ffff71a7397 "opengl", name=name@entry=0x7fff831e3ea5
> "$gl", strict=strict@entry=true) at modules/modules.c:371
> No locals.
> #6  0x00007ffff715abca in vlc_gl_Create (wnd=wnd@entry=0x7fff7c260860,
> flags=flags@entry=0, name=0x7fff831e3ea5 "$gl") at
> video_output/opengl.c:74
>         parent = 0x7fff7c260860
>         glpriv = 0x7fffc4c11a60
>         type = 0x7ffff71a7397 "opengl"
> #7  0x00007fff831e13fb in Open (obj=0x7fffc4c17670) at
> video_output/opengl/display.c:133
>         vd = 0x7fffc4c17670
>         sys = 0x7fffc4c9c8b0
>         __func__ = "Open"
>         gl_name = <optimized out>
>         spu_chromas = 0x7fffc4c06590
> #8  0x00007ffff70f6d13 in module_load (obj=obj@entry=0x7fffc4c17670,
> init=init@entry=0x7ffff70f6c60 <generic_start>,
> args=args@entry=0x7fff881a4928, m=<optimized out>, m=<optimized out>) at
> modules/modules.c:183
>         ap = {{gp_offset = 48, fp_offset = 48, overflow_arg_area =
> 0x7fff881a4a60, reg_save_area = 0x7fff881a4970}}
>         ret = 0
> #9  0x00007ffff70f727a in vlc_module_load (obj=obj@entry=0x7fffc4c17670,
> capability=capability@entry=0x7ffff719687a "vout display",
> name=0x7ffff7197337 "", name@entry=0x7ffff71a76f9 "$vout",
> strict=<optimized out>, probe=probe@entry=0x7ffff70f6c60 <generic_start>)
> at modules/modules.c:279
>         cand = 0x555555776a90
>         ret = <optimized out>
>         i = 0
>         buf =
> "any\000\000\000\000\000\000\000\000\000,\000\000\000\a\000\000\000\000\000\000\000\300\002\000\000\000\000\000"
>         slen = <optimized out>
>         shortcut = 0x7fff881a4940 "any"
>         var = 0x0
>         mods = 0x7fffc4c071e0
>         total = 14
>         __func__ = "vlc_module_load"
>         module = 0x0
>         b_force_backup = false
>         args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area =
> 0x7fff881a4a60, reg_save_area = 0x7fff881a4970}}
> #10 0x00007ffff70f77d4 in module_need (obj=obj@entry=0x7fffc4c17670,
> cap=cap@entry=0x7ffff719687a "vout display",
> name=name@entry=0x7ffff71a76f9 "$vout", strict=<optimized out>) at
> modules/modules.c:371
> No locals.
> #11 0x00007ffff714c95f in vout_display_New (owner=<synthetic pointer>,
> cfg=0x7fffc4c07900, fmt=0x7fff7c2398e0, load_module=true,
> module=0x7ffff71a76f9 "$vout", obj=0x7fffc4c078f0) at
> video_output/display.c:109
>         vd = 0x7fffc4c17670
> #12 DisplayNew (owner_ptr=0x0, hide_timeout=<optimized out>,
> double_click_timeout=<optimized out>, is_splitter=false, module=<optimized
> out>, state=0x7ffff714d200 <VoutDisplayEvent>, source=0x7fff7c2398e0,
> vout=0x7fffc4c078f0) at video_output/display.c:1198
>         osys = <optimized out>
>         owner = <optimized out>
>         cfg = <optimized out>
> #13 vout_NewDisplay (vout=vout@entry=0x7fff7c2398a0,
> source=0x7fff7c2398e0, state=state@entry=0x7fff881a4b30,
> module=module@entry=0x7ffff71a76f9 "$vout",
> double_click_timeout=double_click_timeout@entry=300000,
> hide_timeout=<optimized out>) at video_output/display.c:1255
> No locals.
> #14 0x00007ffff715c250 in vout_OpenWrapper
> (vout=vout@entry=0x7fff7c2398a0, splitter_name=0x0,
> state=state@entry=0x7fff881a4b30) at video_output/vout_wrapper.c:67
>         sys = 0x7fff7c2398d0
>         __func__ = "vout_OpenWrapper"
>         double_click_timeout = 300000
> #15 0x00007ffff714f7ea in ThreadStart (vout=vout@entry=0x7fff7c2398a0,
> state=0x7fff881a4b30, state@entry=0x0) at video_output/video_output.c:1454
>         owner = {sys = 0x7fff7c2398a0, {video = {buffer_new =
> 0x7ffff714e8a0 <VoutVideoFilterInteractiveNewPicture>}, sub =
> {buffer_new = 0x7ffff714e8a0
> <VoutVideoFilterInteractiveNewPicture>}}}
>         state_default = {cfg = {display = {title = 0x0, width = 0, height
> = 0, sar = {num = 1, den = 1}}, align = {horizontal = 0, vertical
> = 0}, is_display_filled = true, zoom = {num = 1, den = 1},
> viewpoint = {yaw = 0, pitch = 0, roll = 0, fov = 80}}, sar = {num
> = 0, den = 0}}
> #16 0x00007ffff7151639 in ThreadControl (cmd=..., vout=0x7fff7c2398a0) at
> video_output/video_output.c:1609
> No locals.
> #17 Thread (object=0x7fff7c2398a0) at video_output/video_output.c:1730
>         cmd = {type = 0, u = {boolean = false, time = 0, time_ptr = 0x0,
> string = 0x0, integer = 0, pair = {a = 0, b = 0}, pause = {is_on =
> false, date = 0}, message = {channel = 0, string = 0x0}, border =
> {left = 0, top = 0, right = 0, bottom = 0}, window = {x = 0, y =
> 0, width = 0, height = 0}, window_mouse = {type =
> VOUT_WINDOW_MOUSE_STATE, x = 0, y = 0, button_mask = 0}, cfg =
> 0x0, subpicture = 0x0, viewpoint = {yaw = 0, pitch = 0, roll = 0,
> fov = 0}}}
>         picture_interlaced = <optimized out>
>         vout = 0x7fff7c2398a0
>         sys = 0x7fff7c2398d0
>         deadline = 0
>         wait = <optimized out>
> #18 0x00007ffff799b51a in start_thread (arg=0x7fff881a5700) at
> pthread_create.c:465
>         pd = 0x7fff881a5700
>         now = <optimized out>
>         unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735476815616,
> -8753639194411078538, 140735564939790, 140735564939791,
> 140735564939952, 0, 8753805515465747574, 8753657076275014774},
> mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data =
> {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
>         not_first_call = <optimized out>
> #19 0x00007ffff74cf3ef in clone () at
> ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
> No locals.
> 
> 
> Ĝis,
> m
> 
> -- 
> http://bodrato.it/papers/
> 
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-- 
Sebastian Ramacher

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