New singleton handling causes debug asserts

[Benjamin Zeller]

The following tests are failing because a Q_ASSERT() is thrown:

tst_qquick_image_extension: QFATAL : tst_UCQQuickImageExtension::scaledBorderIdentity() ASSERT: "parent" in file <workspace>/staging/src/Ubuntu/Components/plugin/ucunits.h, line 35

tst_arguments: QFATAL : tst_UCArguments::testUsage(--usage) ASSERT: "parent" in file <workspace>/staging/src/Ubuntu/Components/plugin/i18n.h, line 41

tst_alarms: QFATAL : tst_UCAlarms::initTestCase() ASSERT: "parent" in file <workspace>/staging/src/Ubuntu/Components/plugin/i18n.h, line 41

tst_deprecated_theme_engine: QFATAL : tst_UCDeprecatedTheme::testNameDefault() ASSERT: "parent" in file <workspace>/staging/src/Ubuntu/Components/plugin/ucfontutils.h, line 40

tst_bottomedge: QFATAL : tst_BottomEdge::initTestCase() ASSERT: "parent" in file <workspace>/staging/src/Ubuntu/Components/plugin/quickutils.h, line 40

[Launchpad Janitor (janitor)]

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

[Cris Dywan (kalikiana)]

It seems moving Q_ASSERT(parent) to if (!parent) qFatal("QuickUtils can't be instantiated without a parent"); would do the trick, it shows in logs and aborts the test run.