Fixed DetachedBuffer self move assignment (#5521)

diff --git a/include/flatbuffers/flatbuffers.h b/include/flatbuffers/flatbuffers.h
index 46457bd..253af15 100644 (file)
--- a/include/flatbuffers/flatbuffers.h
+++ b/include/flatbuffers/flatbuffers.h
@@ -638,6 +638,9 @@ class DetachedBuffer {
   #if !defined(FLATBUFFERS_CPP98_STL)
   // clang-format on
   DetachedBuffer &operator=(DetachedBuffer &&other) {
+    if (this == &other)
+      return *this;
+
     destroy();
 
     allocator_ = other.allocator_;