Hello, Le mardi 2 août 2011 19:26:15 Reinhard Tartler, vous avez écrit : > I managed to reproduce the segmentation fault on io.debian.net, and got > this backtrace: > > (gdb) bt full > #0 0x2c04225a in QVariantAnimation::registerInterpolator(QVariant (*)(void > const*, void const*, double), int) () from /usr/lib/libQtCore.so.4 > No symbol table info available. > #1 0x2b67c5e3 in ?? () from /usr/lib/libQtGui.so.4 > No symbol table info available. > #2 0x281e0f88 in __cxa_finalize () from /lib/i386-kfreebsd-gnu/libc.so.0.1 > No symbol table info available. > #3 0x2b6726b4 in ?? () from /usr/lib/libQtGui.so.4 > No symbol table info available. > #4 0x2bda33c0 in _fini () from /usr/lib/libQtGui.so.4 > No symbol table info available. > #5 0x2805af5e in ?? () from /lib/ld.so.1 > No symbol table info available. > #6 0x2805ba07 in ?? () from /lib/ld.so.1 > No symbol table info available. > #7 0x28337c44 in ?? () from /lib/i386-kfreebsd-gnu/libdl.so.2 > No symbol table info available. > #8 0x2805602b in ?? () from /lib/ld.so.1 > No symbol table info available. > #9 0x2833803c in ?? () from /lib/i386-kfreebsd-gnu/libdl.so.2 > No symbol table info available. > #10 0x28337c7a in dlclose () from /lib/i386-kfreebsd-gnu/libdl.so.2 > No symbol table info available. > #11 0x281249cb in module_Unload (handle=0x812da78) at modules/os.c:236 > No locals. > #12 0x2811ee25 in DeleteModule (p_bank=<value optimized out>, > p_module=0x111) at modules/modules.c:1167 pp_self = <value optimized out> > #13 0x2811f0e7 in module_EndBank (p_this=0x804a004, b_plugins=true) at > modules/modules.c:191 p_bank = <value optimized out> > #14 0x2809a636 in libvlc_InternalCleanup (p_libvlc=0x804a004) at > libvlc.c:1060 p_playlist = <value optimized out> > psz_pidfile = <value optimized out> > #15 0x2806ef46 in libvlc_release (p_instance=0x8049f08) at > control/core.c:107 lock = 0x8049f20 > refs = 0 > #16 0x08048861 in main (argc=2, argv=0xbfbfe720) at cachegen.c:113 > vlc_argv = {0x8048afd "--ignore-config", 0x8048b0d "--quiet", > 0x8048b15 "--no-media-library", 0x8049f70 "--plugin-path=.", 0x8048b3e > "--", 0x0, > 0xbfbfe72c > "\374\350\277\277\f\351\277\277\030\351\277\277)\351\277\277\064\351\277\2 > 77B\351\277\277\062\356\277\277B\356\277\277W\356\277\277m\356\277\277\232\ > 356\277\277\275\356\277\277\311\356\277\277\340\356\277\277\364\356\277\277 > \374\356\277\277\023\357\277\277$\357\277\277D\357\277\277Z\357\277\277"} > vlc = <value optimized out> > path = 0xbfbfe8fa "." > arg = 0x8049f70 "--plugin-path=." > vlc_argc = <value optimized out> > i = 1 > opts = {{name = 0x8048b53 "force", has_arg = 0, flag = 0x0, val = > 102}, {name = 0x8048b59 "help", has_arg = 0, flag = 0x0, val = 104}, {name > = 0x8048b5e "version", has_arg = 0, flag = 0x0, val = 86}, {name = 0x0, > has_arg = 0, flag = 0x0, val = 0}} > c = <value optimized out> > force = <value optimized out> > > note that in frame #12, the parameter p_module is set to 0x1111, which > looks suspicious. The code in modules/modules.c:191 looks like this:
I rather suspect the debug information are corrupted by compiler optimizations at this point. Otherwise, DeleteModule() would crash before module_Unload() gets to invoke dlclose(), as it dereferences p_module. To me, it looks more like Qt4 has (yet another) bug in its static object destructors, which makes it crash dlclose(). VLC may be the only application dlopen()'ing -a shared object that links with- Qt4. And if it's not, it might still well be the only one that does so during as part of its build process. -- Rémi Denis-Courmont http://www.remlab.net/ http://fi.linkedin.com/in/remidenis -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org