segfault in tst_subtheming on xenial

[Timo Jyrinki]

Program received signal SIGSEGV, Segmentation fault.
0x00007fdef2592280 in QV4::Value::operator= (v=<optimized out>, this=0x7fded67ff0) at jsruntime/qv4value_p.h:390
390 jsruntime/qv4value_p.h: No such file or directory.
(gdb) bt
#0 0x00007fdef2592280 in QV4::Value::operator= (v=<optimized out>, this=0x7fded67ff0) at jsruntime/qv4value_p.h:390
#1 QV4::ScopedProperty::ScopedProperty (scope=<synthetic pointer>, this=<synthetic pointer>) at jsruntime/qv4scopedvalue_p.h:436
#2 QV4::Object::insertMember (attributes=..., v=..., s=0x2061440, this=0x7fded67ff0d0) at jsruntime/qv4object_p.h:202
#3 QV4::Object::defineReadonlyProperty (this=0x7fded67ff0d0, name=0x2061440, value=...) at jsruntime/qv4object.cpp:184
#4 0x00007fdef25a1fed in QV4::Heap::StringObject::StringObject (this=<optimized out>, engine=0x2061140, val=...)
    at jsruntime/qv4stringobject.cpp:91
#5 0x00007fdef2548e25 in QV4::MemoryManager::alloc<QV4::StringObject, QV4::ExecutionEngine*, QV4::Value> (arg2=...,
    arg1=0x2061140, this=<optimized out>) at jsruntime/qv4mm_p.h:126
#6 QV4::ExecutionEngine::newStringObject (this=0x2061140, value=...) at jsruntime/qv4engine.cpp:557
#7 0x00007fdef25e474e in QV4::Runtime::callProperty (engine=0x2061140, nameIndex=<optimized out>, callData=0x7fded67ff078)
    at jsruntime/qv4runtime.cpp:969
#8 0x00007fdee891347b in ?? ()
#9 0x00007fded67ff070 in ?? ()
#10 0x00007fded67ff070 in ?? ()
#11 0x000000000284d930 in ?? ()
#12 0x00007fded67ff068 in ?? ()
#13 0x0000000002061140 in ?? ()
#14 0x00007fded67ff060 in ?? ()
#15 0x00007fded67ff058 in ?? ()
#16 0x00007fded67ff060 in ?? ()
#17 0x0000000002061140 in ?? ()
#18 0x00007fdef2584fba in QV4::SimpleScriptFunction::call (that=<optimized out>, callData=<optimized out>)
    at jsruntime/qv4functionobject.cpp:565
#19 0x00007fdef266e07f in QV4::Object::call (d=0x7fded67ff008, this=<optimized out>)
    at ../../include/QtQml/5.5.1/QtQml/private/../../../../../src/qml/jsruntime/qv4object_p.h:305
#20 QQmlJavaScriptExpression::evaluate (this=this@entry=0x229f5c0, context=<optimized out>, function=...,
    callData=callData@entry=0x7fded67ff008, isUndefined=isUndefined@entry=0x7ffd919818ec) at qml/qqmljavascriptexpression.cpp:158
#21 0x00007fdef266e5ad in QQmlJavaScriptExpression::evaluate (this=this@entry=0x229f5c0, context=<optimized out>, function=...,
    isUndefined=isUndefined@entry=0x7ffd919818ec) at qml/qqmljavascriptexpression.cpp:116
#22 0x00007fdef267510c in QQmlBinding::update (this=0x229f5a0, flags=...) at qml/qqmlbinding.cpp:194
#23 0x00007fdef267e6f6 in QQmlAbstractBinding::setEnabled (f=..., e=true, this=0x229f5d8)
    at ../../include/QtQml/5.5.1/QtQml/private/../../../../../src/qml/qml/qqmlabstractbinding_p.h:110
#24 QQmlObjectCreator::finalize (this=0x228dbd0, interrupt=...) at qml/qqmlobjectcreator.cpp:1194
#25 0x00007fdef260911e in QQmlComponentPrivate::complete (enginePriv=0x27f2b40, state=0x26a2060) at qml/qqmlcomponent.cpp:928
#26 0x00007fdef26091e7 in QQmlComponentPrivate::completeCreate (this=0x26a1fc0) at qml/qqmlcomponent.cpp:964
#27 0x00007fdef31cc1e6 in UCStyledItemBasePrivate::loadStyleItem(bool) ()
   from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/libUbuntuComponents.so
#28 0x00007fdef31f15d6 in UCAbstractButtonPrivate::completeComponentInitialization() ()
   from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/libUbuntuComponents.so
#29 0x00007fdef267e7c2 in QQmlObjectCreator::finalize (this=0x272c540, interrupt=...) at qml/qqmlobjectcreator.cpp:1207
#30 0x00007fdef260911e in QQmlComponentPrivate::complete (enginePriv=0x27f2b40, state=0x2058f00) at qml/qqmlcomponent.cpp:928
#31 0x00007fdef26091e7 in QQmlComponentPrivate::completeCreate (this=0x2058e60) at qml/qqmlcomponent.cpp:964
#32 0x00007fdef2609050 in QQmlComponent::create (this=0x26d7f20, context=0x1ff2490) at qml/qqmlcomponent.cpp:791
#33 0x00007fdef2f66c3d in QQuickView::continueExecute (this=this@entry=0x1eceed0) at items/qquickview.cpp:476
#34 0x00007fdef2f6737d in QQuickViewPrivate::execute (this=0x22a0990) at items/qquickview.cpp:124
#35 0x00007fdef353c5d2 in UbuntuTestCase::UbuntuTestCase(QString const&, QQuickView::ResizeMode, bool, QWindow*) ()
   from /usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Test/libUbuntuTest.so
#36 0x000000000040efca in ThemeTestCase::ThemeTestCase (parent=0x0, assertOnFailure=true, file=..., this=0x1eceed0)
    at tst_subtheming.cpp:36
#37 tst_Subtheming::test_default_theme_cleared_with_engine_bug1527546 (this=<optimized out>) at tst_subtheming.cpp:146
#38 0x00000000004086d5 in tst_Subtheming::qt_static_metacall (_o=0x7ffd91982eb0, _id=<optimized out>, _a=<optimized out>,
    _c=<optimized out>) at .moc/tst_subtheming.moc:350
#39 0x00007fdef21690aa in QMetaMethod::invoke (this=this@entry=0x7ffd919825c8, object=object@entry=0x7ffd91982eb0,
    connectionType=Qt::DirectConnection, connectionType@entry=2442667600, returnValue=..., val0=..., val1=..., val2=..., val3=...,
    val4=..., val5=..., val6=..., val7=..., val8=..., val9=...) at kernel/qmetaobject.cpp:2212
#40 0x00007fdef216e7fd in QMetaObject::invokeMethod (obj=0x7ffd91982eb0,
    member=member@entry=0x1ecf040 "test_default_theme_cleared_with_engine_bug1527546", type=2442667600,
    type@entry=Qt::DirectConnection, ret=..., val0=..., val1=..., val2=..., val3=..., val4=..., val5=..., val6=..., val7=...,
    val8=..., val9=...) at kernel/qmetaobject.cpp:1479
#41 0x00007fdef34f508c in QMetaObject::invokeMethod (val9=..., val8=..., val7=..., val6=..., val5=..., val4=..., val3=...,
    val2=..., val1=..., val0=..., type=Qt::DirectConnection, member=0x1ecf040 "test_default_theme_cleared_with_engine_bug1527546",
    obj=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs.h:409
#42 QTest::qInvokeTestMethodDataEntry (slot=0x1ecf040 "test_default_theme_cleared_with_engine_bug1527546") at qtestcase.cpp:1953
#43 QTest::qInvokeTestMethod (slotName=0x1ec9998 "test_default_theme_cleared_with_engine_bug1527546()", data=data@entry=0x0)
    at qtestcase.cpp:2082
#44 0x00007fdef34f5bb8 in QTest::qInvokeTestMethods (testObject=0x7ffd91982eb0) at qtestcase.cpp:2390
#45 QTest::qExec (testObject=testObject@entry=0x7ffd91982eb0, argc=<optimized out>, argv=argv@entry=0x7ffd91982fd8)
    at qtestcase.cpp:2652
#46 0x000000000040744b in main (argc=1, argv=0x7ffd91982fd8) at tst_subtheming.cpp:887

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

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.
 ...