Done a quick test run on i386 and i'd say we are hitting two issues. First there's a crash that seems similar to https://bugreports.qt-project.org/browse/QTBUG-36289 since it goes away when using QV4_FORCE_INTERPRETER=1 The other crash happens when proc is not mounted since it goes away when it is mounted (by default is unmounted in my chroot) *** proc not mounted and QV4_FORCE_INTERPRETER not set *** $ gdb -arg /home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/tst_QmlTests -import /home/webbrowser-app/obj-i686-linux-gnu/src -platform minimal Program received signal SIGSEGV, Segmentation fault. 0xf66af590 in ?? () (gdb) bt #0 0xf66af590 in ?? () #1 0x01000486 in ?? () #2 0x00000008 in ?? () #3 0x56687c08 in ?? () *** proc not mounted and QV4_FORCE_INTERPRETER set *** $ gdb -arg /home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/tst_QmlTests -import /home/webbrowser-app/obj-i686-linux-gnu/src -platform minimal ********* Start testing of QmlTests ********* Config: Using QtTest library 5.2.0, Qt 5.2.0 PASS : QmlTests::AddressBar::initTestCase() PASS : QmlTests::AddressBar::test_file_no_rewrite() PASS : QmlTests::AddressBar::test_http_no_rewrite() PASS : QmlTests::AddressBar::test_https_no_rewrite() PASS : QmlTests::AddressBar::test_no_ipadress_scheme_rewrite() PASS : QmlTests::AddressBar::test_no_scheme_rewrite() PASS : QmlTests::AddressBar::test_search_escape_html_entities() PASS : QmlTests::AddressBar::test_search_url() PASS : QmlTests::AddressBar::test_search_url_single_word() PASS : QmlTests::AddressBar::test_trim_whitespaces() PASS : QmlTests::AddressBar::test_unhandled_scheme_no_rewrite() PASS : QmlTests::AddressBar::test_url_uppercase_rewrite() PASS : QmlTests::AddressBar::cleanupTestCase() QWARN : QmlTests::UnknownTestFunc() file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/Chrome.qml:143:5: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/toolbar_dropshadow.png QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() file:///usr/lib/i386-linux-gnu/qt5/qml/Ubuntu/Components/Themes/Ambiance/ToolbarButtonStyle.qml:33:9: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/browser-tabs.png QWARN : QmlTests::UnknownTestFunc() file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/AddressBar.qml:55:13: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/reload.png QWARN : QmlTests::UnknownTestFunc() file:///usr/lib/i386-linux-gnu/qt5/qml/Ubuntu/Components/Themes/Ambiance/ToolbarButtonStyle.qml:33:9: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/go-next.png QWARN : QmlTests::UnknownTestFunc() file:///usr/lib/i386-linux-gnu/qt5/qml/Ubuntu/Components/Themes/Ambiance/ToolbarButtonStyle.qml:33:9: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/go-previous.png PASS : QmlTests::Chrome::initTestCase() PASS : QmlTests::Chrome::test_enter_url() PASS : QmlTests::Chrome::cleanupTestCase() warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' QWARN : QmlTests::UnknownTestFunc() WARNING: This project is using the experimental QML API extensions for QtWebKit and is therefore tied to a specific QtWebKit release. WARNING: The experimental API will change from version to version, or even be removed. You have been warned! ASSERTION FAILED: stackBase wtf/StackBounds.cpp(146) : void WTF::StackBounds::initialize() warning: unable to open /proc file '/proc/4016/status' warning: unable to open /proc file '/proc/4016/status' 1 0xefa659a0 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(WTFCrash+0x20) [0xefa659a0] 2 0xefa9891f /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(_ZN3WTF11StackBounds10initializeEv+0xcf) [0xefa9891f] 3 0xefa9935e /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(_ZN3WTF13WTFThreadDataC1Ev+0xae) [0xefa9935e] 4 0xefac1394 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(_ZN3WTF19initializeThreadingEv+0x194) [0xefac1394] 5 0xef8dfdfa /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(_ZN3JSC19initializeThreadingEv+0x2a) [0xef8dfdfa] 6 0xed2bfa57 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(+0x251a57) [0xed2bfa57] 7 0xed3c526b /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(+0x35726b) [0xed3c526b] 8 0xed3c72b4 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(+0x3592b4) [0xed3c72b4] 9 0xed3323b8 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(WKPageGroupCreateWithIdentifier+0x48) [0xed3323b8] 10 0xed534236 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(+0x4c6236) [0xed534236] 11 0xed52fab9 /usr/lib/i386-linux-gnu/libQt5WebKit.so.5(_ZN13QQuickWebViewC2EP10QQuickItem+0x59) [0xed52fab9] 12 0xec2128f8 /usr/lib/i386-linux-gnu/qt5/qml/QtWebKit/experimental/libqmlwebkitexperimentalplugin.so(+0x38f8) [0xec2128f8] 13 0xf68b10fe /usr/lib/i386-linux-gnu/libQt5Qml.so.5(_ZNK8QQmlType6createEPP7QObjectPPvj+0x52) [0xf68b10fe] 14 0xf687fca6 /usr/lib/i386-linux-gnu/libQt5Qml.so.5(_ZN7QQmlVME3runEP5QListI9QQmlErrorERKNS_9InterruptEPPKPv+0x1686) [0xf687fca6] 15 0xf6887331 /usr/lib/i386-linux-gnu/libQt5Qml.so.5(_ZN7QQmlVME7executeEP5QListI9QQmlErrorERKNS_9InterruptE+0x5b) [0xf6887331] 16 0xf6873bc5 /usr/lib/i386-linux-gnu/libQt5Qml.so.5(_ZN20QQmlComponentPrivate11beginCreateEP15QQmlContextData+0x16b) [0xf6873bc5] 17 0xf68740d6 /usr/lib/i386-linux-gnu/libQt5Qml.so.5(_ZN13QQmlComponent11beginCreateEP11QQmlContext+0x30) [0xf68740d6] 18 0xf6871493 /usr/lib/i386-linux-gnu/libQt5Qml.so.5(_ZN13QQmlComponent6createEP11QQmlContext+0x5f) [0xf6871493] 19 0xf6c94aae /usr/lib/i386-linux-gnu/libQt5Quick.so.5(_ZN10QQuickView15continueExecuteEv+0x31e) [0xf6c94aae] 20 0xf6c950c8 /usr/lib/i386-linux-gnu/libQt5Quick.so.5(+0x2080c8) [0xf6c950c8] 21 0xf7fba827 /usr/lib/i386-linux-gnu/libQt5QuickTest.so.5(_Z15quick_test_mainiPPcPKcS2_+0x1a17) [0xf7fba827] 22 0x565555f9 /home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/tst_QmlTests(main+0x39) [0x565555f9] 23 0xf7e19a73 /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0xf7e19a73] 24 0x5655562f /home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/tst_QmlTests(+0x62f) [0x5655562f] Program received signal SIGSEGV, Segmentation fault. 0xefa659a2 in ?? () *** proc mounted and QV4_FORCE_INTERPRETER set *** $ /home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/tst_QmlTests -import /home/webbrowser-app/obj-i686-linux-gnu/src -platform minimal file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/AddressBar.qml:55:13: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/reload.png QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? ********* Start testing of QmlTests ********* Config: Using QtTest library 5.2.0, Qt 5.2.0 PASS : QmlTests::AddressBar::initTestCase() PASS : QmlTests::AddressBar::test_file_no_rewrite() PASS : QmlTests::AddressBar::test_http_no_rewrite() PASS : QmlTests::AddressBar::test_https_no_rewrite() PASS : QmlTests::AddressBar::test_no_ipadress_scheme_rewrite() PASS : QmlTests::AddressBar::test_no_scheme_rewrite() PASS : QmlTests::AddressBar::test_search_escape_html_entities() PASS : QmlTests::AddressBar::test_search_url() PASS : QmlTests::AddressBar::test_search_url_single_word() PASS : QmlTests::AddressBar::test_trim_whitespaces() PASS : QmlTests::AddressBar::test_unhandled_scheme_no_rewrite() PASS : QmlTests::AddressBar::test_url_uppercase_rewrite() PASS : QmlTests::AddressBar::cleanupTestCase() QWARN : QmlTests::UnknownTestFunc() file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/Chrome.qml:143:5: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/toolbar_dropshadow.png QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() QFontDatabase: Cannot find font directory '/usr/lib/i386-linux-gnu/fonts' - is Qt installed correctly? QWARN : QmlTests::UnknownTestFunc() file:///usr/lib/i386-linux-gnu/qt5/qml/Ubuntu/Components/Themes/Ambiance/ToolbarButtonStyle.qml:33:9: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/browser-tabs.png QWARN : QmlTests::UnknownTestFunc() file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/AddressBar.qml:55:13: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/reload.png QWARN : QmlTests::UnknownTestFunc() file:///usr/lib/i386-linux-gnu/qt5/qml/Ubuntu/Components/Themes/Ambiance/ToolbarButtonStyle.qml:33:9: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/go-next.png QWARN : QmlTests::UnknownTestFunc() file:///usr/lib/i386-linux-gnu/qt5/qml/Ubuntu/Components/Themes/Ambiance/ToolbarButtonStyle.qml:33:9: QML QQuickImage: Cannot open: file:///home/webbrowser-app/obj-i686-linux-gnu/tests/unittests/qml/undertest/assets/go-previous.png PASS : QmlTests::Chrome::initTestCase() PASS : QmlTests::Chrome::test_enter_url() PASS : QmlTests::Chrome::cleanupTestCase() QWARN : QmlTests::UnknownTestFunc() WARNING: This project is using the experimental QML API extensions for QtWebKit and is therefore tied to a specific QtWebKit release. WARNING: The experimental API will change from version to version, or even be removed. You have been warned! No protocol specified QXcbConnection: Could not connect to display :0 PASS : QmlTests::UbuntuWebView::initTestCase() PASS : QmlTests::UbuntuWebView::test_custom_UA_override() Failed to create shared memory file /WK2SharedMemory.3291417326 Failed to create shared memory file /WK2SharedMemory.2245292388 Failed to create shared memory file /WK2SharedMemory.1103697685 PASS : QmlTests::UbuntuWebView::cleanupTestCase() PASS : QmlTests::UserAgent::initTestCase() PASS : QmlTests::UserAgent::test_get_domain(row 0) PASS : QmlTests::UserAgent::test_get_domain(row 1) PASS : QmlTests::UserAgent::test_get_domain(row 2) PASS : QmlTests::UserAgent::test_get_domain(row 3) PASS : QmlTests::UserAgent::test_get_domain(row 4) PASS : QmlTests::UserAgent::test_get_domain(row 5) PASS : QmlTests::UserAgent::test_get_domain(row 6) PASS : QmlTests::UserAgent::test_get_domain(row 7) PASS : QmlTests::UserAgent::test_get_domain(row 8) PASS : QmlTests::UserAgent::test_get_domain(row 9) PASS : QmlTests::UserAgent::test_get_domain(row 10) PASS : QmlTests::UserAgent::test_get_domain(row 11) PASS : QmlTests::UserAgent::test_get_domain(row 12) PASS : QmlTests::UserAgent::test_get_domains(row 0) PASS : QmlTests::UserAgent::test_get_domains(row 1) PASS : QmlTests::UserAgent::test_get_ua_string(row 0) PASS : QmlTests::UserAgent::test_get_ua_string(row 1) PASS : QmlTests::UserAgent::test_get_ua_string(row 2) PASS : QmlTests::UserAgent::test_get_ua_string(row 3) PASS : QmlTests::UserAgent::test_get_ua_string(row 4) PASS : QmlTests::UserAgent::cleanupTestCase() Totals: 41 passed, 0 failed, 0 skipped ********* Finished testing of QmlTests ********* LEAK: 1 WebContext