[clangd] Guard fuzzer against empty inputs.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@337860 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/clangd/fuzzer/ClangdFuzzer.cpp b/clangd/fuzzer/ClangdFuzzer.cpp
index 7eefff30..86f61070 100644
--- a/clangd/fuzzer/ClangdFuzzer.cpp
+++ b/clangd/fuzzer/ClangdFuzzer.cpp
@@ -20,6 +20,9 @@
 #include <stdio.h>
 
 extern "C" int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
+  if (size == 0)
+    return 0;
+
   clang::clangd::JSONOutput Out(llvm::nulls(), llvm::nulls(),
                                 clang::clangd::Logger::Error, nullptr);
   clang::clangd::CodeCompleteOptions CCOpts;