Gammaray x86_64 build fails with Qt 5.12

08:40:03 | /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot-native/usr/bin/x86_64-poky-linux/x86_64-poky-linux-g++  -fPIC  -m64 -march=corei7 -mtune=corei7 -mfpmath=sse -msse4.2  --sysroot=/work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot  -O2 -pipe -g -feliminate-unused-debug-types -fdebug-prefix-map=/work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0=/usr/src/debug/gammaray/5.11+gitAUTOINC+2cd4585e28-r0 -fdebug-prefix-map=/work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot-native= -fdebug-prefix-map=/work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot=  -fvisibility-inlines-hidden  -m64 -march=corei7 -mtune=corei7 -mfpmath=sse -msse4.2  --sysroot=/work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot -Wunused-but-set-variable -Wlogical-op -Wsizeof-pointer-memaccess -Wreorder -Wno-c++1z-extensions -Wall -Wextra -pedantic -Woverloaded-virtual -Winit-self -Wmissing-include-dirs -Wunused -Wundef -Wpointer-arith -Wmissing-noreturn -Werror=return-type -Wswitch -std=gnu++0x -fno-operator-names -Wzero-as-null-pointer-constant -DNDEBUG -Wl,--fatal-warnings -Wl,--no-undefined -lc -Wl,-z,origin -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -shared  -o ../../lib/gammaray/2.9/qt5_12-x86_64/gammaray_wlcompositorinspector.so CMakeFiles/gammaray_wlcompositorinspector.dir/wlcompositorinspector.cpp.o CMakeFiles/gammaray_wlcompositorinspector.dir/wlcompositorinterface.cpp.o CMakeFiles/gammaray_wlcompositorinspector.dir/clientsmodel.cpp.o CMakeFiles/gammaray_wlcompositorinspector.dir/resourceinfo.cpp.o CMakeFiles/gammaray_wlcompositorinspector.dir/moc_wlcompositorinspector.cpp.o CMakeFiles/gammaray_wlcompositorinspector.dir/gammaray_wlcompositorinspector_automoc.cpp.o -Wl,-rpath,"\$ORIGIN/../../../" ../../lib/libgammaray_core-qt5_12-x86_64.so.2.9.1 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libQt5WaylandCompositor.so.5.12.0 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libwayland-server.so ../../lib/libgammaray_common-qt5_12-x86_64.so.2.9.1 ../../lib/libgammaray_kitemmodels-qt5_12-x86_64.so.2.9.1 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libQt5Quick.so.5.12.0 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libQt5Gui.so.5.12.0 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libQt5Qml.so.5.12.0 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libQt5Network.so.5.12.0 /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/recipe-sysroot/usr/lib/libQt5Core.so.5.12.0
08:40:03 | /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/build/plugins/guisupport/moc_guisupport.cpp:227:1: error: narrowing conversion of ''\37777777703'' from 'char' to 'unsigned char' inside { } [-Wnarrowing]
08:40:03 |  };
08:40:03 |  ^
08:40:03 | /work/build/build/tmp/work/corei7-64-poky-linux/gammaray/5.11+gitAUTOINC+2cd4585e28-r0/build/plugins/guisupport/moc_guisupport.cpp:227:1: error: narrowing conversion of ''\37777777674'' from 'char' to 'unsigned char' inside { } [-Wnarrowing]