fuzz: Fix test_runner error reporting

Author: MarcoFalke

test/fuzz/test_runner.py

@@ -371,19 +371,19 @@ def job(t, args):
     for future in as_completed(jobs):
         output, result, target = future.result()
         logging.debug(output)
-        if using_libfuzzer:
-            done_stat = [l for l in output.splitlines() if "DONE" in l]
-            assert len(done_stat) == 1
-            stats.append((target, done_stat[0]))
         try:
             result.check_returncode()
         except subprocess.CalledProcessError as e:
             if e.stdout:
                 logging.info(e.stdout)
             if e.stderr:
                 logging.info(e.stderr)
-            logging.info(f"Target {result.args} failed with exit code {e.returncode}")
+            logging.info(f"⚠️ Failure generated from target with exit code {e.returncode}: {result.args}")
             sys.exit(1)
+        if using_libfuzzer:
+            done_stat = [l for l in output.splitlines() if "DONE" in l]
+            assert len(done_stat) == 1
+            stats.append((target, done_stat[0]))
 
     if using_libfuzzer:
         print("Summary:")