[Xcb] [Bug 36716] xv crashed at _xcb_map_remove (list=0x828d9c0, key=2818) at xcb_list.c:89

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36716

--- Comment #2 from Martin Mokrejs <mmokrejs at fold.natur.cuni.cz> 2011-05-02 15:15:21 PDT ---
(gdb) p *cur
$1 = (node *) 0x74697720
(gdb) p **cur
Cannot access memory at address 0x74697720
(gdb)


I tried again but got a different stacktrace (filed on Gentoo as
http://bugs.gentoo.org/show_bug.cgi?id=365765)

Regarding valgrind ...

$ valgrind xv ../file.png 
==2688== Memcheck, a memory error detector
==2688== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==2688== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==2688== Command: xv ../file.png
==2688== 
==2688== Invalid read of size 8
==2688==    at 0x4391FE9: __strncmp_ssse3 (strcmp-ssse3.S:911)
==2688==    by 0x43FD0B8: XauGetBestAuthByAddr (AuGetBest.c:154)
==2688==    by 0x43DE7BA: get_authptr (xcb_auth.c:143)
==2688==    by 0x43DEA09: _xcb_get_auth_info (xcb_auth.c:314)
==2688==    by 0x43DE390: xcb_connect_to_display_with_auth_info
(xcb_util.c:424)
==2688==    by 0x43DE6B2: xcb_connect (xcb_util.c:395)
==2688==    by 0x40ADDF4: _XConnectXCB (xcb_disp.c:78)
==2688==    by 0x409E73D: XOpenDisplay (OpenDis.c:129)
==2688==    by 0x80532A6: parseResources (xv.c:1243)
==2688==    by 0x8054AC9: main (xv.c:375)
==2688==  Address 0x44090e0 is 16 bytes inside a block of size 18 alloc'd
==2688==    at 0x40256DD: malloc (vg_replace_malloc.c:195)
==2688==    by 0x43FD40D: read_counted_string (AuRead.c:58)
==2688==    by 0x43FD4FF: XauReadAuth (AuRead.c:86)
==2688==    by 0x43FD003: XauGetBestAuthByAddr (AuGetBest.c:116)
==2688==    by 0x43DE7BA: get_authptr (xcb_auth.c:143)
==2688==    by 0x43DEA09: _xcb_get_auth_info (xcb_auth.c:314)
==2688==    by 0x43DE390: xcb_connect_to_display_with_auth_info
(xcb_util.c:424)
==2688==    by 0x43DE6B2: xcb_connect (xcb_util.c:395)
==2688==    by 0x40ADDF4: _XConnectXCB (xcb_disp.c:78)
==2688==    by 0x409E73D: XOpenDisplay (OpenDis.c:129)
==2688==    by 0x80532A6: parseResources (xv.c:1243)
==2688==    by 0x8054AC9: main (xv.c:375)
==2688== 
vex x86->IR: unhandled instruction bytes: 0x66 0x66 0x66 0x2E
==2688== valgrind: Unrecognised instruction at address 0x4392c64.
==2688== Your program just tried to execute an instruction that Valgrind
==2688== did not recognise.  There are two possible reasons for this.
==2688== 1. Your program has a bug and erroneously jumped to a non-code
==2688==    location.  If you are running Memcheck and you just saw a
==2688==    warning about a bad jump, it's probably your program's fault.
==2688== 2. The instruction is legitimate but Valgrind doesn't handle it,
==2688==    i.e. it's Valgrind's fault.  If you think this is the case or
==2688==    you are not sure, please let us know and we'll try to fix it.
==2688== Either way, Valgrind will now raise a SIGILL signal which will
==2688== probably kill your program.
==2688== 
==2688== Process terminating with default action of signal 4 (SIGILL): dumping
core
==2688==  Illegal opcode at address 0x4392C64
==2688==    at 0x4392C64: __strncmp_ssse3 (strcmp-ssse3.S:1877)
==2688==    by 0x43FD0B8: XauGetBestAuthByAddr (AuGetBest.c:154)
==2688==    by 0x43DE7BA: get_authptr (xcb_auth.c:143)
==2688==    by 0x43DEA09: _xcb_get_auth_info (xcb_auth.c:314)
==2688==    by 0x43DE390: xcb_connect_to_display_with_auth_info
(xcb_util.c:424)
==2688==    by 0x43DE6B2: xcb_connect (xcb_util.c:395)
==2688==    by 0x40ADDF4: _XConnectXCB (xcb_disp.c:78)
==2688==    by 0x409E73D: XOpenDisplay (OpenDis.c:129)
==2688==    by 0x80532A6: parseResources (xv.c:1243)
==2688==    by 0x8054AC9: main (xv.c:375)
==2688== 
==2688== HEAP SUMMARY:
==2688==     in use at exit: 3,019 bytes in 13 blocks
==2688==   total heap usage: 25 allocs, 12 frees, 3,192 bytes allocated
==2688== 
==2688== LEAK SUMMARY:
==2688==    definitely lost: 0 bytes in 0 blocks
==2688==    indirectly lost: 0 bytes in 0 blocks
==2688==      possibly lost: 0 bytes in 0 blocks
==2688==    still reachable: 3,019 bytes in 13 blocks
==2688==         suppressed: 0 bytes in 0 blocks
==2688== Rerun with --leak-check=full to see details of leaked memory
==2688== 
==2688== For counts of detected and suppressed errors, rerun with: -v
==2688== ERROR SUMMARY: 2 errors from 1 contexts (suppressed: 7 from 7)
Illegal instruction
$

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