couchjs segfault in libmozjs.so

[Jason Gerard DeRose]

Binary package hint: couchdb

from dmesg:

...
[18335.207248] couchjs[26911]: segfault at 78 ip 00007f650640c11e sp 00007fffe6175fe0 error 4 in libmozjs.so[7f65062f8000+30a000]
[18335.304737] couchjs[26921]: segfault at 78 ip 00007fed0676811e sp 00007fff73cd7c80 error 4 in libmozjs.so[7fed06654000+30a000]
[18335.400104] couchjs[26931]: segfault at 78 ip 00007fa84f09711e sp 00007fff873cfa30 error 4 in libmozjs.so[7fa84ef83000+30a000]
[18335.506561] couchjs[26941]: segfault at 78 ip 00007f008c00b11e sp 00007fff93f49900 error 4 in libmozjs.so[7f008bef7000+30a000]

With some help from CardinalFang in #desktopcouch, can reproduce with these steps.

1) $ killall beam beam.smp desktopcouch-service

2) $ /usr/lib/desktopcouch/desktopcouch-service

3) $ firefox ~/.local/share/desktop-couch/couchdb.html

4) Visit a view like http://localhost:45855/dmedia/_design/file/_view/bytes

I attached what I think is a core dump file, hopefully it's useful. CardinalFang mentioned that apport should be catching this, but it's not:

jderose@jgd-ws:~$ cat /proc/sys/kernel/core_pattern
(08:05:52 PM) jderose: |/usr/share/apport/apport %p %s %c

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: couchdb (not installed)
ProcVersionSignature: Ubuntu 2.6.38-2.29-generic 2.6.38-rc3
Uname: Linux 2.6.38-2-generic x86_64
Architecture: amd64
CheckboxSubmission: fdbdfcded0c0bb479a6b52e9ec5af131
CheckboxSystem: edda5d4f616ca792bf437989cb597002
Date: Mon Feb 7 20:32:16 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007.1)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 LC_MESSAGES=en_US.utf8
 SHELL=/bin/bash
SourcePackage: couchdb

[Jason Gerard DeRose (jderose)]

Ah, just in case this is something triggered because of the specific dmedia view functions, here's the code:

map = """
function(doc) {
    if (doc.type == 'dmedia/file' && typeof(doc.bytes) == 'number') {
        emit(doc.bytes, doc.bytes);
    }
}
"""

reduce = '_sum'