update-mime-info segfaults

Looks like the problem was that a file in /usr/share/mime was malformatted. Nevermind. Sorry about that.

Thanks for your bug. Was that file shipped by an Ubuntu package or a file corrupted or coming from a different source?

Your bug lacks information we would need to investigate further. We
are now going to close the bug - please reopen if you have more
information at hand.

This problem ran into me while I was upgrading through gutsy revisions. update-mime-database kept crashing - for instance, in the post/pre install/rm scripts for sun-java5-jre, or even in shared-mime-info's scripts. Here's a backtrace of what happens when "update-mime-database /usr/share/mime" happens:

Program received signal SIGSEGV, Segmentation fault.
0x0804bc15 in write_match (key=0x8059ce8, data=0xffba48b4)
    at update-mime-database.c:2228
2228 offset = mdata->offset + 32 * g_list_index (mdata->matches, magic->matches->data);
(gdb) bt
#0 0x0804bc15 in write_match (key=0x8059ce8, data=0xffba48b4)
    at update-mime-database.c:2228
#1 0xf7dd3789 in g_ptr_array_foreach () from /usr/lib/libglib-2.0.so.0
#2 0x0804b82d in write_cache (cache=0x8059fc8) at update-mime-database.c:2366
#3 0x0804e472 in main (argc=Cannot access memory at address 0x4
) at update-mime-database.c:2869
#4 0xf7c8f040 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#5 0x08049c51 in _start ()
(gdb)

If I sit at the top frame and try to print any of the mentioned variables (offset, mdata, magic), they're all apparently not in the context. As a heads up, this is the i386 package running in a chroot, on a x64 host.

What version of Ubuntu do you use? Could you try to figure if the crash is triggered by a corrupted desktop?

Maybe you can forget about it! I was using gutsy - I'm currently up-to-date [last updated an hour or two ago] and it no longer crashes. :)

Thanks for let us know about it! :-)

I am running into a similar problem running Lucid 10.04, and I am running into a similar problem with shared-mime-info. Basically whenever I try running apt-get install I get:

Errors were encountered while processing shared-mime-info. (essentially same thing as first post)

 Here is the backtrace for update-mime-database of /usr/share/mime

#0 0x00007ffff7559850 in ?? () from /lib/libc.so.6
#1 0x00007ffff7aeca6a in _ _xmlParserInputBufferCreateFilename () from /usr/lib/libxml2/so.2
#2 0x00007ffff7ac1d9d in xmlNewInputFromFile () from /usr/lib/libxml2.so.2
#3 0x00007ffff7ac61c6 in xmlCreateURLParseCtxt () from /usr/lib/libxml2.so.2
#4 0x00007ffff7adcfae in xmlSAXParseFileWithData () from /usr/lib/libxml2.so.2
#5 0x00000000004065e6 in ?? ()
#6 0x000000000040785b in ?? ()
#7 0x00007ffff7449c4d in _ _libc_start_main () from /lib/libc.so.6
#8 0x0000000000402829 in ?? ()
#9 0x00007fffffffe7a8 in ?? ()
#10 0x000000000000001c in ?? ()
#11 0x0000000000000002 in ?? ()
#12 0x00007fffffffe9b4 in ?? ()
#13 0x00007fffffffe9d7 in ?? ()
#14 0x0000000000000000 in ?? ()

Ive got the same problem in a Lucid instalation - until now without solution:

root@ligp:~# strace -f update-mime-database.real /usr/share/mime/
execve("/usr/bin/update-mime-database.real", ["update-mime-database.real", "/usr/share/mime/"], [/* 27 vars */]) = 0
brk(0) = 0x1dc6000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb361772000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=60151, ...}) = 0
mmap(NULL, 60151, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fb361763000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/usr/lib/libxml2.so.2", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\354\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=1372312, ...}) = 0
mmap(NULL, 3472728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fb361205000
mprotect(0x7fb36134b000, 2093056, PROT_NONE) = 0
mmap(0x7fb36154a000, 40960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x145000) = 0x7fb36154a000
mmap(0x7fb361554000, 3416, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fb361554000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libglib-2.0.so.0", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P}\1\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=905480, ...}) = 0
mmap(NULL, 3002736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fb360f27000
mprotect(0x7fb361002000, 2097152, PROT_NONE) = 0
mmap(0x7fb361202000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xdb000) = 0x7fb361202000
mmap(0x7fb361204000, 368, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fb361204000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0`\355\1\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1572232, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb361762000
mmap(NULL, 3680296, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fb360ba4000
mprotect(0x7fb360d1e000, 2093056, PROT_NONE) = 0
mmap(0x7fb360f1d000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x179000) = 0x7fb360f1d000
mmap(0x7fb360f22000, 18472, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fb360f22000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
open("/lib/libdl.so.2", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\r\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=14696, ...}) = 0
mmap(NULL, 2109696, PR...

Same problem Leonardo Silva has, combined with failure with package gconf2. 55 packages cannot be configured because of that.

dmesg | tail
[ 719.871495] gconftool-2[1424]: segfault at 300001c4f ip 00007fa70e6aa280 sp 00007fffefbea0b8 error 4 in libc-2.11.1.so[7fa70e627000+17a000]
[ 720.054924] update-mime-dat[1428]: segfault at 300001c4f ip 00007f2e56981280 sp 00007fffd68d95c8 error 4 in libc-2.11.1.so[7f2e568fe000+17a000]

Attached is the strace output for

strace -o/tmp/strace.txt update-mime-database.real /usr/share/mime