diff --git a/clang-tools-extra/clangd/RIFF.cpp b/clang-tools-extra/clangd/RIFF.cpp
--- a/clang-tools-extra/clangd/RIFF.cpp
+++ b/clang-tools-extra/clangd/RIFF.cpp
@@ -18,9 +18,9 @@
 }
 
 llvm::Expected<Chunk> readChunk(llvm::StringRef &Stream) {
+  Chunk C;
   if (Stream.size() < 8)
     return makeError("incomplete chunk header");
-  Chunk C;
   std::copy(Stream.begin(), Stream.begin() + 4, C.ID.begin());
   Stream = Stream.drop_front(4);
   uint32_t Len = llvm::support::endian::read32le(Stream.take_front(4).begin());