Check that shaders is not empty

Author: kevyuu

src/nbl/video/CVulkanLogicalDevice.cpp

@@ -1499,6 +1499,7 @@ void CVulkanLogicalDevice::createRayTracingPipelines_impl(
             }
         }
         outCreateInfo->stageCount = std::distance<decltype(outCreateInfo->pStages)>(outCreateInfo->pStages,outShaderStage);
+        assert(outCreateInfo->stageCount != 0);
 
         const auto& shaderGroups = info.shaderGroups;
         outCreateInfo->pGroups = outShaderGroup;

src/nbl/video/ILogicalDevice.cpp

@@ -974,8 +974,13 @@ bool ILogicalDevice::createRayTracingPipelines(IGPUPipelineCache* const pipeline
     {
         if (param.cached.maxRecursionDepth > limits.maxRayRecursionDepth)
         {
-          NBL_LOG_ERROR("Invalid maxRecursionDepth. maxRecursionDepth(%u) exceed the limits(%u)", param.cached.maxRecursionDepth, limits.maxRayRecursionDepth);
-          return false;
+            NBL_LOG_ERROR("Invalid maxRecursionDepth. maxRecursionDepth(%u) exceed the limits(%u)", param.cached.maxRecursionDepth, limits.maxRayRecursionDepth);
+            return false;
+        }
+        if (param.getShaders().empty())
+        {
+            NBL_LOG_ERROR("Pipeline must have at least one shader.");
+            return false;
         }
     }