diff --git a/src/roma/byob/example/example_udf.cc b/src/roma/byob/example/example_udf.cc
index ec59309da..b72c12e23 100644
--- a/src/roma/byob/example/example_udf.cc
+++ b/src/roma/byob/example/example_udf.cc
@@ -39,7 +39,7 @@ void WriteResponseToFd(int fd, EchoResponse resp) {
 
 int main(int argc, char* argv[]) {
   if (argc != 2) {
-    std::cerr << "Expecting exactly one argument";
+    std::cerr << "Expecting exactly one argument" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/callback_payload_read.cc b/src/roma/byob/udf/callback_payload_read.cc
index 51ab1689d..be76cad10 100644
--- a/src/roma/byob/udf/callback_payload_read.cc
+++ b/src/roma/byob/udf/callback_payload_read.cc
@@ -44,7 +44,7 @@ void WriteResponseToFd(int fd, ReadCallbackPayloadResponse resp) {
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/callback_payload_write.cc b/src/roma/byob/udf/callback_payload_write.cc
index f19418b80..dad94821f 100644
--- a/src/roma/byob/udf/callback_payload_write.cc
+++ b/src/roma/byob/udf/callback_payload_write.cc
@@ -44,7 +44,7 @@ void WriteResponseToFd(int fd, WriteCallbackPayloadResponse resp) {
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/new_udf.cc b/src/roma/byob/udf/new_udf.cc
index 79cefdf3f..eb8de4cd8 100644
--- a/src/roma/byob/udf/new_udf.cc
+++ b/src/roma/byob/udf/new_udf.cc
@@ -37,7 +37,7 @@ void WriteResponseToFd(int fd, SampleResponse resp) {
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/payload_read.cc b/src/roma/byob/udf/payload_read.cc
index 0b873e682..2ddab4fe4 100644
--- a/src/roma/byob/udf/payload_read.cc
+++ b/src/roma/byob/udf/payload_read.cc
@@ -39,7 +39,7 @@ void WriteResponseToFd(int fd, ReadPayloadResponse resp) {
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/payload_write.cc b/src/roma/byob/udf/payload_write.cc
index 92f980856..3d7b200d0 100644
--- a/src/roma/byob/udf/payload_write.cc
+++ b/src/roma/byob/udf/payload_write.cc
@@ -39,7 +39,7 @@ void WriteResponseToFd(int fd, GeneratePayloadResponse resp) {
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/prime_sieve_udf.cc b/src/roma/byob/udf/prime_sieve_udf.cc
index e6e4c631e..135c37d58 100644
--- a/src/roma/byob/udf/prime_sieve_udf.cc
+++ b/src/roma/byob/udf/prime_sieve_udf.cc
@@ -67,7 +67,7 @@ void WriteResponseToFd(int fd, RunPrimeSieveResponse resp) {
 
 int main(int argc, char** argv) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/sample_udf.cc b/src/roma/byob/udf/sample_udf.cc
index aacd1ad71..242a310fd 100644
--- a/src/roma/byob/udf/sample_udf.cc
+++ b/src/roma/byob/udf/sample_udf.cc
@@ -93,7 +93,7 @@ void RunEchoCallback(int fd) {
 
 int main(int argc, char* argv[]) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
@@ -115,6 +115,7 @@ int main(int argc, char* argv[]) {
       }
       break;
     default:
+      std::cerr << "Unexpected input" << std::endl;
       break;
   }
   WriteResponseToFd(fd, std::move(bin_response));
diff --git a/src/roma/byob/udf/sample_udf.go b/src/roma/byob/udf/sample_udf.go
index 7331db931..14d67f40d 100644
--- a/src/roma/byob/udf/sample_udf.go
+++ b/src/roma/byob/udf/sample_udf.go
@@ -123,7 +123,7 @@ func main() {
 			runEchoCallback(file)
 		}
 	default:
-		log.Print("Unexpected input")
+		log.Println("Unexpected input")
 		return
 	}
 	writeResponseToFd(file, binResponse)
diff --git a/src/roma/byob/udf/sort_list_100k_udf.cc b/src/roma/byob/udf/sort_list_100k_udf.cc
index 5e1f80059..558037682 100644
--- a/src/roma/byob/udf/sort_list_100k_udf.cc
+++ b/src/roma/byob/udf/sort_list_100k_udf.cc
@@ -20042,7 +20042,7 @@ void WriteResponseToFd(int fd) {
 
 int main(int argc, char** argv) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/sort_list_10k_udf.cc b/src/roma/byob/udf/sort_list_10k_udf.cc
index d43d90853..549b30b2b 100644
--- a/src/roma/byob/udf/sort_list_10k_udf.cc
+++ b/src/roma/byob/udf/sort_list_10k_udf.cc
@@ -2042,7 +2042,7 @@ void WriteResponseToFd(int fd) {
 
 int main(int argc, char** argv) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);
diff --git a/src/roma/byob/udf/sort_list_1m_udf.cc b/src/roma/byob/udf/sort_list_1m_udf.cc
index dd031f735..be5027bfb 100644
--- a/src/roma/byob/udf/sort_list_1m_udf.cc
+++ b/src/roma/byob/udf/sort_list_1m_udf.cc
@@ -200042,7 +200042,7 @@ void WriteResponseToFd(int fd) {
 
 int main(int argc, char** argv) {
   if (argc < 2) {
-    std::cerr << "Not enough arguments!";
+    std::cerr << "Not enough arguments!" << std::endl;
     return -1;
   }
   int fd = std::stoi(argv[1]);