miro crashes on startup with Illegal instruction in libjavascriptcoregtk-1.0.so.0

[J G Miller]

PRETTY_NAME="Ubuntu quantal (12.10)"
VERSION="12.10, Quantal Quetzal"

Package: miro
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Architecture: i386
Version: 4.0.4-1

(gdb) run /usr/bin/miro.real
Starting program: /usr/bin/python /usr/bin/miro.real
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb2319b40 (LWP 16723)]
[New Thread 0xb1a18b40 (LWP 16724)]
[New Thread 0xb10ceb40 (LWP 16725)]
[New Thread 0xb06ffb40 (LWP 16726)]
2013-03-04 03:50:41,390 INFO root: Starting up Miro
2013-03-04 03:50:41,397 INFO root: Version: 4.0.4
2013-03-04 03:50:41,401 INFO root: Revision: <email address hidden>:pculture/miro.git - 284c92ad
2013-03-04 03:50:41,405 INFO root: Builder: buildd@rothera
2013-03-04 03:50:41,419 INFO root: Build Time: 1330314923.65
2013-03-04 03:50:41,424 INFO root: Debugmode: False
2013-03-04 03:50:41,425 INFO root: Reading HTTP Password list
2013-03-04 03:50:41,434 INFO root: Starting libCURL thread
[New Thread 0xafcffb40 (LWP 16727)]
2013-03-04 03:50:41,635 INFO root: Starting event loop thread
[New Thread 0xaf4feb40 (LWP 16728)]
[New Thread 0xaecfdb40 (LWP 16729)]
[New Thread 0xae4fcb40 (LWP 16730)]
[New Thread 0xadcfbb40 (LWP 16731)]
2013-03-04 03:50:41,675 INFO root: Loading core extensions in /usr/share/miro/resources/extensions
2013-03-04 03:50:41,679 INFO root: Installing deleted file checker...
2013-03-04 03:50:41,681 INFO root: Restoring database...
2013-03-04 03:50:41,687 INFO root: Sqlite3 version: 3.7.13
2013-03-04 03:50:41,688 INFO root: Pysqlite version: 2.6.0
2013-03-04 03:50:41,697 INFO root: opening database /home/users/miller/.miro/sqlitedb
2013-03-04 03:50:41,707 INFO root: Loading user extensions in /home/users/miller/.miro/extensions
2013-03-04 03:50:41,788 TIMING root: Database upgrade time: 0.104
2013-03-04 03:50:41,805 INFO root: Linux version: Linux 3.5.0-25-generic i686
2013-03-04 03:50:41,811 INFO root: Python version: 2.7.3 (default, Sep 26 2012, 21:53:58)
[GCC 4.7.2]
2013-03-04 03:50:41,812 INFO root: Gtk+ version: (2, 24, 13)
2013-03-04 03:50:41,814 INFO root: PyGObject version: (2, 28, 6)
2013-03-04 03:50:41,828 INFO root: PyGtk version: (2, 24, 0)
2013-03-04 03:50:41,830 INFO root: Language: [('LANGUAGE', 'en_US.UTF-8'), ('LANG', 'en_US.UTF-8')]
2013-03-04 03:50:42,961 INFO root: Loading video converters...
2013-03-04 03:50:42,968 INFO root: libtorrent: 0.16.3.0
2013-03-04 03:50:42,969 INFO root: pycurl: libcurl/7.27.0 GnuTLS/2.12.14 zlib/1.2.7 libidn/1.25 librtmp/2.3
2013-03-04 03:50:43,752 INFO root: GStreamer version: GStreamer 0.10.36
2013-03-04 03:50:44,072 INFO root: GStreamer audiosink: gconfaudiosink
2013-03-04 03:50:44,119 INFO root: GStreamer videosink: gconfvideosink
2013-03-04 03:50:44,122 INFO root: GStreamer version: GStreamer 0.10.36
2013-03-04 03:50:44,133 INFO root: GStreamer audiosink: gconfaudiosink
2013-03-04 03:50:44,140 INFO root: set_renderer: successfully loaded gstreamerrenderer
2013-03-04 03:50:44,448 INFO root: setup tabs...
2013-03-04 03:50:44,552 INFO root: setup theme...
2013-03-04 03:50:45,272 INFO root: Checking movies directory '/home/users/miller/.miro/Movies/'...
2013-03-04 03:50:47,696 TIMING root: idle (reconnect downloaders) too slow (2.415 secs)
[New Thread 0xa1623b40 (LWP 16738)]
2013-03-04 03:50:54,436 TIMING root: idle (handling backend message: <miro.messages.TrackDevices object at 0x9c128cc>) too slow (0.681 secs)
[New Thread 0xa0d87b40 (LWP 16739)]
[New Thread 0xa0586b40 (LWP 16740)]
2013-03-04 03:50:56,725 TIMING root: idle (curl transfer callback) too slow (0.544 secs)
2013-03-04 03:50:58,430 TIMING root: idle (curl transfer callback) too slow (0.890 secs)
2013-03-04 03:50:59,471 TIMING root: idle (curl transfer callback) too slow (0.765 secs)
[New Thread 0x9fbd2b40 (LWP 16741)]
[New Thread 0x9eed4b40 (LWP 16742)]
[New Thread 0x9e6d3b40 (LWP 16743)]
[New Thread 0x9ded2b40 (LWP 16744)]
[New Thread 0x9d6d1b40 (LWP 16745)]
[New Thread 0x9ced0b40 (LWP 16746)]
[New Thread 0x9c6cfb40 (LWP 16747)]
2013-03-04 03:51:01,752 INFO root: Starting auto downloader...
[New Thread 0x9be54b40 (LWP 16748)]
2013-03-04 03:51:01,926 INFO root: this platform has the built-in autoupdate parser disabled. Skipping.
[Thread 0x9c6cfb40 (LWP 16747) exited]
[Thread 0x9e6d3b40 (LWP 16743) exited]
2013-03-04 03:51:03,495 TIMING root: idle (curl transfer callback) too slow (1.542 secs)
[Thread 0x9ced0b40 (LWP 16746) exited]
[Thread 0x9eed4b40 (LWP 16742) exited]
[Thread 0xa1623b40 (LWP 16738) exited]
[Thread 0x9ded2b40 (LWP 16744) exited]
2013-03-04 03:51:05,628 TIMING root: idle (curl transfer callback) too slow (1.971 secs)
2013-03-04 03:51:05,636 TIMING root: idle (curl transfer callback) cumulative is too slow (6.642 secs)

Program received signal SIGILL, Illegal instruction.
0xb400be26 in ?? () from /usr/lib/libjavascriptcoregtk-1.0.so.0

Package: libjavascriptcoregtk-1.0-0
Origin: Ubuntu
Maintainer: Ubuntu Developers <email address hidden>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Architecture: i386
Source: webkit
Version: 1.10.0-0ubuntu1.1

~/.miro/miro-downloader-log: No such file or directory

Temporarily purging libjavascriptcoregtk-1.0 demonstrates that miro does indeed need this library although it is not listed
as a direct dependecy in the package summary.

miro.real
ImportError on miro.plat.frontends.widgets: libjavascriptcoregtk-1.0.so.0: cannot open shared object file: No such file or directory
ImportError on miro.frontends.widgets: libjavascriptcoregtk-1.0.so.0: cannot open shared object file: No such file or directory

[J G Miller (jgmiller)]

After installing the debug symbols for libjavascriptcoregtk-1.0.so.0 , gdb reveals

Program received signal SIGILL, Illegal instruction.
0xb4197e26 in llint_op_jless () from /usr/lib/libjavascriptcoregtk-1.0.so.0

This crash also occurs with the lates Miro 5.0.4 downloaded from upstream, so it would seem that this bug should in fact be filed against libjavascriptcoregtk rather than miro.