Crash in QV4::MemoryManager::mark()

Thread 1 "appman" received signal SIGSEGV, Segmentation fault. 0x0000007fbe4de9ac in QV4::ExecutableCompilationUnit::markObjects(QV4::MarkStack*) () from /usr/lib/libQt5Qml.so.5 (gdb) bt #0 0x0000007fbe4de9ac in QV4::ExecutableCompilationUnit::markObjects(QV4::MarkStack*) () from /usr/lib/libQt5Qml.so.5 #1 0x0000007fbe420068 in QV4::ExecutionEngine::markObjects(QV4::MarkStack*) () from /usr/lib/libQt5Qml.so.5 #2 0x0000007fbe3a716c in QV4::MemoryManager::collectRoots(QV4::MarkStack*) () from /usr/lib/libQt5Qml.so.5 #3 0x0000007fbe3a73fc in QV4::MemoryManager::mark() () from /usr/lib/libQt5Qml.so.5 #4 0x0000007fbe3a8ed4 in ?? () from /usr/lib/libQt5Qml.so.5 #5 0x0000007fbe3aac34 in QV4::MemoryManager::allocData(unsigned long) () from /usr/lib/libQt5Qml.so.5 #6 0x0000007fbe610c54 in QV4::QQmlValueTypeWrapper::create(QV4::ExecutionEngine*, QVariant const&, QMetaObject const*, int) () from /usr/lib/libQt5Qml.so.5 #7 0x0000007fbe42070c in QV4::ExecutionEngine::fromVariant(QVariant const&) () from /usr/lib/libQt5Qml.so.5 #8 0x0000007fbe64e6b4 in ?? () from /usr/lib/libQt5Qml.so.5 #9 0x0000007fbe4d4510 in QV4::Runtime::CallPropertyLookup::call(QV4::ExecutionEngine*, QV4::Value const&, unsigned int, QV4::Value*, int) () from /usr/lib/libQt5Qml.so.5 #10 0x0000007f54d5d278 in ?? () #11 0x0000007fbe457c08 in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext const*) () from /usr/lib/libQt5Qml.so.5 #12 0x0000007fbe457c08 in QV4::Function::call(QV4::Value const*, QV4::Value cons-Type <RET> for more, q to quit, c to continue without paging-c t*, int, QV4::ExecutionContext const*) () from /usr/lib/libQt5Qml.so.5 #13 0x0000007fbe7b5000 in ?? () from /usr/lib/libQt5Qml.so.5 Backtrace stopped: previous frame inner to this frame (corrupt stack?)