From 7bfc2a3143ef61d4e4bbc043b4b5deb3e0935627 Mon Sep 17 00:00:00 2001
From: caifubi <caifubi1@huawei.com>
Date: Wed, 30 Dec 2020 15:34:19 +0800
Subject: [PATCH] Fix Segmentation fault on Ascend

---
 .../ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc b/mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc
index 89838d8f3f..890fad9b74 100644
--- a/mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc
+++ b/mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc
@@ -710,6 +710,10 @@ bool AscendKernelRuntime::RunTask(const session::KernelGraph *graph) {
 
 bool AscendKernelRuntime::SyncStream() {
   InnerSetContext();
+  if (stream_ == nullptr) {
+    MS_LOG(ERROR) << "SyncStream failed. stream_ is nullptr";
+    return false;
+  }
   if (RT_ERROR_NONE != rtStreamSynchronize(stream_)) {  // o for switch stream
     MS_LOG(ERROR) << "Call runtime rtStreamSynchronize error.";
     return false;