Specify err

execute.py

@@ -139,8 +139,7 @@ def unsafe_execute_cpp(check_program, result, timeout):
                     result.append(f"failed: {err}")                 
 
             except subprocess.TimeoutExpired as e:
-                result.append("timed out")            
-
+                result.append("timed out")
 
 def unsafe_execute_go(check_program, result, timeout):
 
@@ -167,7 +166,6 @@ def unsafe_execute_go(check_program, result, timeout):
         except subprocess.TimeoutExpired as e:
             result.append("timed out")
 
-
 def unsafe_execute_java(check_program, result, timeout):
 
     with create_tempdir():
@@ -185,7 +183,8 @@ def unsafe_execute_java(check_program, result, timeout):
             except subprocess.TimeoutExpired as e:
                 continue
         if compile_returncode != 0:
-            res = "failed: compilation error"
+            err = compilation_result.stderr.decode() if compilation_result.stderr else compilation_result.stdout.decode()
+            res = "failed: compilation error: " + err
         else:
             try:
                 exec_result = subprocess.run([f'java', '-cp', '.', 'Main'], timeout=timeout, capture_output=True)
@@ -261,9 +260,11 @@ def unsafe_execute_rust(check_program, result, timeout, cargo_string):
         if exec_result.returncode == 0:
             result.append("passed")
         else:
-            result.append("failed: execution error: " + exec_result.stderr.decode())
+            err = compilation_result.stderr.decode() if compilation_result.stderr else compilation_result.stdout.decode()
+            result.append("failed: execution error: " + err)
     else:
-        result.append("failed: compilation error: " + compilation_result.stderr.decode())
+        err = compilation_result.stderr.decode() if compilation_result.stderr else compilation_result.stdout.decode()
+        result.append("failed: compilation error: " + err)
 
     # Move back to the original working directory
     os.chdir(WD)