Don't neglect to "return *this". git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@165860 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/fstream b/include/fstream index 7b6578f..1b8e7a0 100644 --- a/include/fstream +++ b/include/fstream 
@@ -344,6 +344,7 @@  {  close();  swap(__rhs); + return *this;  }    #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES