Index: cfe/trunk/include/clang/Tooling/Core/Replacement.h
===================================================================
--- cfe/trunk/include/clang/Tooling/Core/Replacement.h
+++ cfe/trunk/include/clang/Tooling/Core/Replacement.h
@@ -255,7 +255,7 @@
 
   /// \brief Merges \p Replaces into the current replacements. \p Replaces
   /// refers to code after applying the current replacements.
-  Replacements merge(const Replacements &Replaces) const;
+  LLVM_NODISCARD Replacements merge(const Replacements &Replaces) const;
 
   // Returns the affected ranges in the changed code.
   std::vector<Range> getAffectedRanges() const;