[wasm] Add the 'end' opcode at the end of the fuzzer input

test/fuzzer/wasm-code.cc

Index: test/fuzzer/wasm-code.cc
diff --git a/test/fuzzer/wasm-code.cc b/test/fuzzer/wasm-code.cc
index 0ff3bb514e9c29ddb1c751a11ce2d38fb2732c8b..41e12987e079542cc03e0161338011c32dad2a85 100644
--- a/test/fuzzer/wasm-code.cc
+++ b/test/fuzzer/wasm-code.cc
@@ -68,6 +68,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   v8::internal::wasm::WasmFunctionBuilder* f =
       builder.AddFunction(sigs.i_iii());
   f->EmitCode(data, static_cast<uint32_t>(size));
+  uint8_t end_opcode = kExprEnd;
+  f->EmitCode(&end_opcode, 1);
   f->ExportAs(v8::internal::CStrVector("main"));
 
   ZoneBuffer buffer(&zone);