See if disable PCH helps

.gitlab-ci.yml

@@ -6,7 +6,7 @@
 
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
-  CMAKE_ARGS_WINDOWS: '-DCMAKE_GENERATOR_PLATFORM=x64 -DCeres_DIR="D:/Program Files/Ceres" -DPORTAUDIO_DIR="D:/Build/portaudio" -DPYLON_DIR="D:/Program Files/pylon6/Development" -DEigen3_DIR="C:/Program Files (x86)/Eigen3/share/eigen3/cmake" -DOpenCV_DIR="D:/Build/opencv/build/install" -DCUDA_TOOLKIT_ROOT_DIR="C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v10.2" -DWITH_OPENVR=TRUE -DOPENVR_DIR="D:/Build/OpenVRSDK" -DWITH_CERES=TRUE'
+  CMAKE_ARGS_WINDOWS: '-DCMAKE_DISABLE_PRECOMPILE_HEADERS=True -DCMAKE_GENERATOR_PLATFORM=x64 -DCeres_DIR="D:/Program Files/Ceres" -DPORTAUDIO_DIR="D:/Build/portaudio" -DPYLON_DIR="D:/Program Files/pylon6/Development" -DEigen3_DIR="C:/Program Files (x86)/Eigen3/share/eigen3/cmake" -DOpenCV_DIR="D:/Build/opencv/build/install" -DCUDA_TOOLKIT_ROOT_DIR="C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v10.2" -DWITH_OPENVR=TRUE -DOPENVR_DIR="D:/Build/OpenVRSDK" -DWITH_CERES=TRUE'
 
 stages:
  - all

applications/gui2/src/modules/addsource.cpp

@@ -13,6 +13,8 @@ void AddCtrl::init() {
 }
 
 void AddCtrl::show() {
+	// Note: By chance, the pointer can in fact pass this test as another
+	// widget gets allocated to the exact same address
 	if (!window || screen->childIndex(window) == -1) {
 		window = new ftl::gui2::AddSourceWindow(screen, this);
 	}