From 9dff320d9cc3fb10f43007e554cf1b05cf70b925 Mon Sep 17 00:00:00 2001
From: fary86 <fary.fanrui@huawei.com>
Date: Mon, 7 Sep 2020 20:01:56 +0800
Subject: [PATCH] Fix SparseApplyFtrl ut segmentfault in pynative mode

---
 mindspore/core/abstract/abstract_value.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mindspore/core/abstract/abstract_value.h b/mindspore/core/abstract/abstract_value.h
index f9bf8f84ba..b66e5a9c3f 100644
--- a/mindspore/core/abstract/abstract_value.h
+++ b/mindspore/core/abstract/abstract_value.h
@@ -563,7 +563,9 @@ class AbstractRefKey : public AbstractBase {
   }
   inline void set_value(const ValuePtr &value) {
     AbstractBase::set_value(value);
-    ref_key_value_ = value->cast<RefKeyPtr>();
+    if (value != nullptr) {
+      ref_key_value_ = value->cast<RefKeyPtr>();
+    }
   }
   RefKeyPtr ref_key_value() const { return ref_key_value_; }
   AbstractBasePtr Join(const AbstractBasePtr &other) override;