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PiperOrigin-RevId: 949726715

centipede/centipede_test.cc

diff --git a/centipede/centipede_test.cc b/centipede/centipede_test.cc
index 3e7a471..e242d2d 100644
--- a/centipede/centipede_test.cc
+++ b/centipede/centipede_test.cc
@@ -1406,9 +1406,8 @@
   fuzztest::internal::DefaultCallbacksFactory<
       fuzztest::internal::CentipedeDefaultCallbacks>
       callbacks;
-  EXPECT_DEATH(
-      [&] { std::exit(CentipedeMain(env, callbacks)); }(),
-      ContainsRegex("Failure *: INPUT FAILURE: some_failure_description"));
+  EXPECT_DEATH([&] { std::exit(CentipedeMain(env, callbacks)); }(),
+               ContainsRegex("Failure *: some_failure_description"));
 }
 
 TEST_F(CentipedeWithTemporaryLocalDir, EngineWorksInStandaloneMode) {
@@ -1428,7 +1427,7 @@
         const int status = std::system(test_command.c_str());
         std::exit(WEXITSTATUS(status));
       }(),
-      ContainsRegex("Failure *: INPUT FAILURE: some_failure_description"));
+      ContainsRegex("Failure *: some_failure_description"));
 }
 
 }  // namespace

centipede/engine_worker.cc

diff --git a/centipede/engine_worker.cc b/centipede/engine_worker.cc
index 5c8d2c3..a1febf0 100644
--- a/centipede/engine_worker.cc
+++ b/centipede/engine_worker.cc
@@ -299,14 +299,28 @@
   WorkerEmitFailureOutput("SETUP FAILURE: ", message);
 }
 
+// TODO(xinhaoyuan): Some of them are planned to be removed.
+static constexpr std::array<std::string_view, 3> kNonFindingPrefixes = {
+    "SETUP FAILURE:",
+    "IGNORED FAILURE:",
+    "SKIPPED TEST:",
+};
+
 void WorkerEmitFinding(std::string_view description,
                        std::string_view signature) {
   WorkerCheck(
       GetWorkerState().in_adapter_execute.load(std::memory_order_relaxed),
       "Must emit finding in adapter execute");
+  for (auto bad_prefix : kNonFindingPrefixes) {
+    if (description.substr(0, bad_prefix.size()) == bad_prefix) {
+      WorkerLog("Got bad prefix in the finding description: ", description);
+      WorkerEmitError("Bad prefix in the finding description");
+      return;
+    }
+  }
   const bool ignored = GetWorkerState().has_finding.exchange(true);
   if (!ignored) {
-    WorkerCheck(WorkerEmitFailureOutput("INPUT FAILURE: ", description),
+    WorkerCheck(WorkerEmitFailureOutput(/*prefix=*/"", description),
                 "Failed to emit failure output for the finding");
     if (const char* finding_signature_path =
             GetWorkerFlag(kWorkerFailureSignaturePathFlagHeader);