diff --git a/source/backend/opencl/core/runtime/OpenCLRuntime.cpp b/source/backend/opencl/core/runtime/OpenCLRuntime.cpp
index e25aef71d..5ba3caaf6 100644
--- a/source/backend/opencl/core/runtime/OpenCLRuntime.cpp
+++ b/source/backend/opencl/core/runtime/OpenCLRuntime.cpp
@@ -296,11 +296,12 @@ OpenCLRuntime::OpenCLRuntime(const BackendConfig::PrecisionMode precision, const
             
         }else{
             mIsCreateError = true;
-            MNN_ASSERT(1 <= gpuDevices.size());
         }
     }else{
         mIsCreateError = true;
-        MNN_ASSERT(platforms.size() > 0);
+    }
+    if (mIsCreateError) {
+        return;
     }
     {
         // Init info
diff --git a/tools/converter/source/optimizer/onnxextra/OnnxPrelu.cpp b/tools/converter/source/optimizer/onnxextra/OnnxPrelu.cpp
index e10738ca9..689aeec6b 100644
--- a/tools/converter/source/optimizer/onnxextra/OnnxPrelu.cpp
+++ b/tools/converter/source/optimizer/onnxextra/OnnxPrelu.cpp
@@ -134,7 +134,7 @@ class OnnxTriluTransform : public OnnxExtraManager::Transform {
         }
         auto k = (inputs.size() == 2 ? inputs[1] : _Scalar<int>(0));
         auto mask = (upper ? _GreaterEqual(rangeW, rangeH + k) : _GreaterEqual(rangeH, rangeW - k));
-        mask = _Reshape(mask, _Concat({_Fill(_Size(shape) - _Scalar<int>(2), oneV), _Shape(mask)}, 0));
+        mask = _Reshape(mask, _Concat({_Fill(_Unsqueeze(_Size(shape) - _Scalar<int>(2), {0}), oneV), _Shape(mask)}, 0));
         auto res = _Select(mask, inputs[0], zero);
         res->setName(expr->outputName(0));
         return res->expr().first;