diff --git a/irr/src/COpenGLCoreCacheHandler.h b/irr/src/COpenGLCoreCacheHandler.h
index 744511629..bf588aa8a 100644
--- a/irr/src/COpenGLCoreCacheHandler.h
+++ b/irr/src/COpenGLCoreCacheHandler.h
@@ -100,7 +100,9 @@ class COpenGLCoreCacheHandler
 									GL.Enable(curTextureType);
 #endif
 
-							GL.BindTexture(curTextureType, static_cast<const TOpenGLTexture *>(texture)->getOpenGLTextureName());
+							auto name = static_cast<const TOpenGLTexture *>(texture)->getOpenGLTextureName();
+							_IRR_DEBUG_BREAK_IF(name == 0)
+							GL.BindTexture(curTextureType, name);
 						} else {
 							texture = 0;
 
diff --git a/irr/src/COpenGLCoreRenderTarget.h b/irr/src/COpenGLCoreRenderTarget.h
index 50656ce1f..96eacc207 100644
--- a/irr/src/COpenGLCoreRenderTarget.h
+++ b/irr/src/COpenGLCoreRenderTarget.h
@@ -35,8 +35,14 @@ public:
 		ColorAttachment = Driver->getFeature().ColorAttachment;
 		MultipleRenderTarget = Driver->getFeature().MultipleRenderTarget;
 
-		if (ColorAttachment > 0)
+		if (ColorAttachment > 0) {
+			TEST_GL_ERROR(Driver);
 			Driver->irrGlGenFramebuffers(1, &BufferID);
+			if (!BufferID) {
+				os::Printer::log("COpenGLCoreRenderTarget: framebuffer not created", ELL_ERROR);
+				return;
+			}
+		}
 
 		AssignedTextures.set_used(static_cast<u32>(ColorAttachment));
 
diff --git a/irr/src/COpenGLCoreTexture.h b/irr/src/COpenGLCoreTexture.h
index 63551cc0a..1b02c9234 100644
--- a/irr/src/COpenGLCoreTexture.h
+++ b/irr/src/COpenGLCoreTexture.h
@@ -99,6 +99,11 @@ public:
 		}
 
 		GL.GenTextures(1, &TextureName);
+		TEST_GL_ERROR(Driver);
+		if (!TextureName) {
+			os::Printer::log("COpenGLCoreTexture: texture not created", ELL_ERROR);
+			return;
+		}
 
 		const COpenGLCoreTexture *prevTexture = Driver->getCacheHandler()->getTextureCache().get(0);
 		Driver->getCacheHandler()->getTextureCache().set(0, this);
@@ -195,6 +200,11 @@ public:
 #endif
 
 		GL.GenTextures(1, &TextureName);
+		TEST_GL_ERROR(Driver);
+		if (!TextureName) {
+			os::Printer::log("COpenGLCoreTexture: texture not created", ELL_ERROR);
+			return;
+		}
 
 		const COpenGLCoreTexture *prevTexture = Driver->getCacheHandler()->getTextureCache().get(0);
 		Driver->getCacheHandler()->getTextureCache().set(0, this);
diff --git a/irr/src/OpenGL/Driver.cpp b/irr/src/OpenGL/Driver.cpp
index 25c9a14f6..2f6a3ebdf 100644
--- a/irr/src/OpenGL/Driver.cpp
+++ b/irr/src/OpenGL/Driver.cpp
@@ -212,6 +212,7 @@ void COpenGL3DriverBase::initQuadsIndices(u32 max_vertex_count)
 	}
 	QuadIndexVBO.upload(QuadsIndices.data(), QuadsIndices.size() * sizeof(u16),
 		0, GL_STATIC_DRAW, true);
+	assert(QuadIndexVBO.exists());
 }
 
 void COpenGL3DriverBase::initVersion()
@@ -626,6 +627,7 @@ void COpenGL3DriverBase::drawBuffers(const scene::IVertexBuffer *vb,
 	const void *vertices = vb->getData();
 	if (hwvert) {
 		assert(hwvert->IsVertex);
+		assert(hwvert->Vbo.exists());
 		GL.BindBuffer(GL_ARRAY_BUFFER, hwvert->Vbo.getName());
 		vertices = nullptr;
 	}
@@ -633,6 +635,7 @@ void COpenGL3DriverBase::drawBuffers(const scene::IVertexBuffer *vb,
 	const void *indexList = ib->getData();
 	if (hwidx) {
 		assert(!hwidx->IsVertex);
+		assert(hwidx->Vbo.exists());
 		GL.BindBuffer(GL_ELEMENT_ARRAY_BUFFER, hwidx->Vbo.getName());
 		indexList = nullptr;
 	}