packagekit crashes when installing clicks on read-only image

Hi,

(I've been getting this since Friday, but couldn't get a backtrace til today)

When installing Clicks under the new read-only images, packagekit crashes and the click scope halts. Symptom is that the app downloads 100%, and then UI doesn't update. Then the app home scope doesn't work at all anymore until device is rebooted.

Launching packagit -v -v -v by hand didn't show anything:
15:12:19 PackageKit adding 100 at 44 (ms)
15:12:19 PackageKit averaged 1 points
15:12:19 PackageKit not enough samples for accurate time: 1
15:12:19 PackageKit this will now take ~0 seconds
15:12:19 PackageKit emitting changed
15:12:19 PackageKit duplicate set of 100
15:12:19 PackageKit emitting changed
15:12:19 PackageKit percentage cannot go down!
15:12:19 PackageKit averaged 1 points
15:12:19 PackageKit not enough samples for accurate time: 1
15:12:19 PackageKit this will now take ~0 seconds
15:12:19 PackageKit emitting changed
15:12:19 PackageKit duplicate set of 0
15:12:19 PackageKit emitting changed
15:12:19 PackageKit percentage cannot go down!
15:12:19 PackageKit averaged 1 points
15:12:19 PackageKit not enough samples for accurate time: 1
15:12:19 PackageKit this will now take ~0 seconds
15:12:19 PackageKit emitting changed
15:12:19 PackageKit duplicate set of 50
15:12:19 PackageKit ignoring message (turn on DeveloperMode): percentage value is going down to 0 from 50
15:12:19 PackageKit ignoring message (turn on DeveloperMode): percentage value is going down to 0 from 50
15:12:19 PackageKit emitting changed
15:12:19 PackageKit adding 100 at 613 (ms)
15:12:19 PackageKit ignoring gradient: 0.000000
15:12:19 PackageKit averaged 1 points
15:12:19 PackageKit not enough samples for accurate time: 1
15:12:19 PackageKit this will now take ~0 seconds
15:12:19 PackageKit emitting changed
15:12:20 PackageKit duplicate set of 100

outside of some warnings and backtrace was corrupt without debug symbols.

After installing packagekit-dbg, I got more debug logs:
17:09:57 PackageKit idle is 80
17:10:02 PackageKit idle is 85
17:10:07 PackageKit idle is 90
17:10:08 PackageKit GetTid method called
17:10:08 PackageKit job count now 8
17:10:08 PackageKit deferring low priority write until idle
17:10:08 PackageKit trying to open database '/var/lib/PackageKit/transactions.db'
17:10:08 PackageKit job count is now at 7
17:10:08 PackageKit transaction now new
17:10:08 PackageKit setting sender to :1.46
[New Thread 0x419ff3f0 (LWP 1931)]
17:10:08 PackageKit uid=32011, count=0
17:10:08 PackageKit adding transaction 0x17ce188, item 0x17b7388
17:10:08 PackageKit sending tid: '/8_daccccee_data'
17:10:08 PackageKit doing deferred write syncronous

(packagekitd:1706): PackageKit-ERROR **: failed to set job id: attempt to write a readonly database

Program received signal SIGTRAP, Trace/breakpoint trap.
0x40097fe6 in __libc_do_syscall ()
   from /lib/arm-linux-gnueabihf/libpthread.so.0

(gdb) thread apply all bt

Thread 5 (Thread 0x419ff3f0 (LWP 1931)):
#0 0x40097fe6 in __libc_do_syscall ()
   from /lib/arm-linux-gnueabihf/libpthread.so.0
#1 0x40094000 in pthread_cond_timedwait@@GLIBC_2.4 ()
   from /lib/arm-linux-gnueabihf/libpthread.so.0
#2 0x40329f5c in g_cond_wait_until ()
   from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#3 0x402de6a4 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#4 0x402de6a4 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 4 (Thread 0x423ff3f0 (LWP 1711)):
#0 0x4040fde4 in poll () from /lib/arm-linux-gnueabihf/libc.so.6
#1 0x402fcdf6 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#2 0x402fcdf6 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x410053f0 (LWP 1709)):
#0 0x4040fde4 in poll () from /lib/arm-linux-gnueabihf/libc.so.6
#1 0x402fcdf6 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#2 0x402fcdf6 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x4073f220 (LWP 1706)):
#0 0x40097fe6 in __libc_do_syscall ()
   from /lib/arm-linux-gnueabihf/libpthread.so.0
#1 0x400972de in raise () from /lib/arm-linux-gnueabihf/libpthread.so.0
#2 0x40301aae in g_logv () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#3 0x40301b68 in g_log () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#4 0x00029a90 in pk_transaction_db_defer_write_job_count_cb (tdb=0x42503b70)
    at pk-transaction-db.c:528
#5 0x402fcbd2 in g_main_context_dispatch ()
   from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#6 0x402fce32 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
#7 0x402fce32 in ?? () from /lib/arm-linux-gnueabihf/libglib-2.0.so.0
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

So it seems packagekit tries writing to some read-only file which is consistent with the fact that remount / as rw works around part of the issue.

Cheers,