diff --git a/examples/tetris/src/tetris.d b/examples/tetris/src/tetris.d
index e9aad5bd..6d0922cc 100644
--- a/examples/tetris/src/tetris.d
+++ b/examples/tetris/src/tetris.d
@@ -25,9 +25,6 @@ mixin APP_ENTRY_POINT;
 /// entry point for dlangui based application
 extern (C) int UIAppMain(string[] args) {
 
-    //auto power2 = delegate(int X) { return X * X; };
-    auto power2 = (int X) => X * X;
-
     // embed resources listed in views/resources.list into executable
     embeddedResourceList.addResources(embedResourcesFromList!("resources.list")());
 
diff --git a/src/dlangui/platforms/sdl/sdlapp.d b/src/dlangui/platforms/sdl/sdlapp.d
index dfec34f3..d9016227 100644
--- a/src/dlangui/platforms/sdl/sdlapp.d
+++ b/src/dlangui/platforms/sdl/sdlapp.d
@@ -1390,6 +1390,7 @@ int sdlmain(string[] args) {
         // we want OpenGL 3.3
         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION,3);
         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION,2);
+        SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
         // Set OpenGL attributes
         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
diff --git a/src/dlangui/platforms/windows/winapp.d b/src/dlangui/platforms/windows/winapp.d
index 41913ea5..f38a5366 100644
--- a/src/dlangui/platforms/windows/winapp.d
+++ b/src/dlangui/platforms/windows/winapp.d
@@ -1020,19 +1020,24 @@ int myWinMain(void* hInstance, void* hPrevInstance, char* lpCmdLine, int iCmdSho
 	currentTheme = createDefaultTheme();
 
     version (USE_OPENGL) {
-        import derelict.opengl3.gl3;
-        DerelictGL3.load();
+        try {
+            import derelict.opengl3.gl3;
+            DerelictGL3.load();
 
-        // just to check OpenGL context
-        Log.i("Trying to setup OpenGL context");
-        Win32Window tmpWindow = new Win32Window(w32platform, ""d, null, 0);
-        destroy(tmpWindow);
-        if (openglEnabled)
-            Log.i("OpenGL support is enabled");
-        else
-            Log.w("OpenGL support is disabled");
-        // process messages
-        platform.enterMessageLoop();
+            // just to check OpenGL context
+            Log.i("Trying to setup OpenGL context");
+            Win32Window tmpWindow = new Win32Window(w32platform, ""d, null, 0);
+            destroy(tmpWindow);
+            if (openglEnabled)
+                Log.i("OpenGL support is enabled");
+            else
+                Log.w("OpenGL support is disabled");
+            // process messages
+            platform.enterMessageLoop();
+        } catch (Exception e) {
+            Log.e("Exception while trying to init OpenGL", e);
+            openglEnabled = false;
+        }
     }
 
     // Load versions 1.2+ and all supported ARB and EXT extensions.