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[Launchpad Bug Tracker <1514517@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package mediascanner2 -
0.110+16.04.20151216-0ubuntu1

---------------
mediascanner2 (0.110+16.04.20151216-0ubuntu1) xenial; urgency=medium

  [ James Henstridge ]
  * Fix up handling of directory renames, so old contents is correctly
    removed from the index and inotify watches for subdirectories are
    cleaned up. (LP: #1460411)
  * If the mediascanner index can not be opened, catch the exception in
    the QML plugin and act as if the database is empty.  A warning is
    printed via Qt's logging framework.  This prevents QML apps using
    mediascanner from terminating if there is a problem opening the
    media index. (LP: #1514517)

  [ CI Train Bot ]
  * debian/libmediascanner-2.0-3.symbols: update to released version.

 -- James Henstridge <james.henstridge@xxxxxxxxxxxxx>  Wed, 16 Dec 2015
08:04:43 +0000

** Changed in: mediascanner2 (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1514517

Title:
  instantiating QML MediaStore component crashes if index can't be
  opened

Status in Canonical System Image:
  In Progress
Status in Ubuntu Music App:
  Incomplete
Status in mediascanner2 package in Ubuntu:
  Fix Released

Bug description:
  App crashes during start.
  This app just works for me 1 time each 6 times proximately in all versions that I used from ubuntu (bq 4.5 ubuntu edition)

  This is one of the logs from one crash:

  ThumbnailerImageResponse::dbusCallFinished(): D-Bus error:  "Request cancelled"
  libust[15292/15337]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15292/15336]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
  UbuntuWindow::handleSurfaceFocusChange(focused=false)
  ** Application is now inactive
  libust[15457/15460]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15457/15460]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15457/15461]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15457/15461]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
  Loading module: 'libubuntu_application_api_touch_mirclient.so.3.0.0'
  /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene: unrecognized option '--url='
  /usr/lib/arm-linux-gnueabihf/qt5/bin/qmlscene: invalid option -- 'I'

  (process:15457): dconf-WARNING **: Unable to open
  /custom/xdg/data/dconf/profile/custom: Permission denied

  (process:15457): dconf-WARNING **: unable to open named profile (custom): using the null configuration.
  libust[15457/15483]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15457/15483]: Error: Error opening shm /lttng-ust-wait-5 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15457/15484]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
  libust[15457/15484]: Error: Error opening shm /lttng-ust-wait-5-32011 (in get_wait_shm() at lttng-ust-comm.c:958)
  terminate called after throwing an instance of 'std::runtime_error'
    what():  Tried to open a db with schema version -1, while supported version is 9.


  
  In this file there was also advices saying that numerous thumbnailer request was failed but I think that it is normal...
  If you need the complete log just tell me.

  I talk with some people that told me that the app works fine form them so i think that maybe the app is trying to open some corrupted files or files that it can't manage.
  Additional info: I'm using as /home/phablet/Music folder a symbolic link for my SD card Music folder.

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