Crash when having multiple QQuickViews in a row

Bug #1527546 reported by Albert Astals Cid on 2015-12-18
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Canonical System Image
Critical
Zoltan Balogh
ubuntu-ui-toolkit (Ubuntu)
Critical
Zsombor Egri

Bug Description

This crash has started with Qt 5.5.1 that is more strict with sharing objects between qml engines.

My guess it is something wrong with the theming engine that seems to be a singleton for all qml engines.

When running the example that i will attach with

QV4_FORCE_INTERPRETER=1 QV4_MM_AGGRESSIVE_GC=1 ./borrame3

in xenial i get

$ QV4_FORCE_INTERPRETER=1 QV4_MM_AGGRESSIVE_GC=1 ./borrame3
A
B
QMetaProperty::read: Unable to handle unregistered datatype 'PaletteValues_QMLTYPE_2*' for property 'Palette_QMLTYPE_3::selected'
QMetaProperty::read: Unable to handle unregistered datatype 'PaletteValues_QMLTYPE_2*' for property 'Palette_QMLTYPE_3::selected'
QMetaProperty::read: Unable to handle unregistered datatype 'PaletteValues_QMLTYPE_2*' for property 'Palette_QMLTYPE_3::selected'
Segmentation fault

while vivid+overlay (has qt 5.4) gets me
A
B
C

the backtrace of the crash in Xenial is http://paste.ubuntu.com/14086991/

Related branches

Albert Astals Cid (aacid) wrote :
Albert Astals Cid (aacid) wrote :
Albert Astals Cid (aacid) wrote :
Zsombor Egri (zsombi) on 2016-01-08
Changed in ubuntu-ui-toolkit (Ubuntu):
importance: Undecided → Critical
status: New → In Progress
assignee: nobody → Zsombor Egri (zsombi)
Launchpad Janitor (janitor) wrote :
Download full text (7.0 KiB)

This bug was fixed in the package ubuntu-ui-toolkit - 1.3.1872+16.04.20160308-0ubuntu1

---------------
ubuntu-ui-toolkit (1.3.1872+16.04.20160308-0ubuntu1) xenial; urgency=medium

  [ Timo Jyrinki ]
  * Fix gles unit test skipping.
  * Add s390x to the unit test skipping architectures
  * UITK test plan - wily -> xenial. Fixes LP: #1544490

  [ Christian Dywan ]
  * Print errors when QuickUtils fails to create a component.
  * unit tests shouldn't use deprecated Dialog.callera
  * Correctly count only test case results. The result= value is used in suites
    and results.
  * Skip tst_pagehead_visible flakes on non-arm. Fixes LP: #1534651
  * Skip flaky tst_mousefilterTest::doubleClicked. Fixes LP: #1542215
  * Suppress click signal if releasing outside of ListItem. Fixes LP: #1541148.
  * Use gdb in runtest.sh to produce backtraces.
  * Arrow keys change value of a Slider. Fixes LP: #1523824.
  * Only use Maliit when enabled explicitly in the environment

  [ Oliver Tilloy ]
  * Do not try to assign to non-existent property "activeFocusOnPress".
    Fixes LP: #1532953
  * Bubble up ESC key press event if there is no popover to close.
    Fixes LP: #1546627

  [ Loïc Molinari ]
  * Added private items and nodes for the new component styles.
    Fixes LP: #1523836
  * Made use of new private Frame item for the focusing.
  * Fixed performance monitor crash because of a NULL timer pointer dereference.
    Fixes LP: #1546986
  * Fixed performance monitor dangling pointer crash. Fixes LP: #1546984
  * [ProportionalShape] Ensured width/height ratio is correct with default values.
    Fixes LP: #1546546
  * Added a workaround to prevent a crash while changing the QPA scale factor.

  [ Florian Boucault ]
  * Always on performance monitor that logs frames that too long to render.
  * MainView: proceed to selecting the theme automatically at startup too.
    Fixes LP: #1535819
  * MainView: when no gradient color is needed for the background, rely on
    QQuickWindow's GL clear color. Lessens overdraw considerably for most
    apps. Fixes LP: #1439133.
  * Panel: MathUtils used without import prefix was leading to undefined
    reference.
  * Label: use native rendering on low dpi screens (GRID_UNIT_PX <= 10) for
    sharper looking text.
  * Gallery: added palette browser to Colors page.

  [ Tim Peeters ]
  * Support scrolling in ListViews with horizontal orientation to the
    qquicklistview CPO.
  * Add background to AppHeader and remove contents clipping from MainView.
    Fixes LP: #1531016, LP: #1531457.
  * Hide AppHeader when using AdaptivePageLayout. Fixes bug 1531871.
    Fixes LP: #1531871.
  * Implement horizontal flicking in the flickable autopilot CPO.
  * Re-order to list of pages in the gallery to be alphabetical.
  * Fix the autopilot failures introduced with the horizontal scrolling in
    the Flickable CPO.
  * Update documentation for MainView, Page, AdaptivePageLayout to use the new
    PageHeader in all examples. Deprecate old properties. Fixes LP: #1540574
  * Add 'animate' property to new internal AppHeaderBase, and do not show a
    header animation when starting an app without header.
    Fixes LP: #1518002, LP: #1524901.
 ...

Read more...

Changed in ubuntu-ui-toolkit (Ubuntu):
status: In Progress → Fix Released
Changed in canonical-devices-system-image:
assignee: nobody → Zoltan Balogh (bzoltan)
status: New → Fix Committed
importance: Undecided → Critical
milestone: none → ww08-2016
Changed in canonical-devices-system-image:
status: Fix Committed → Fix Released
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