M src/platform/perf-main.c → src/platform/perf-main.c

@@ -121,7 +121,7 @@ } else {
 		printf("%u frames in %" PRIu64 " microseconds: %g fps (%gx)\n", frames, duration, scaledFrames / duration, scaledFrames / (duration * 60.f));
 	}
 
-	return 0;
+	return GBAThreadHasCrashed(&context);
 }
 
 static void _GBAPerfRunloop(struct GBAThread* context, int* frames, bool quiet) {

M tools/perf.py → tools/perf.py

@@ -40,7 +40,7 @@ proc.wait()
         except:
             proc.kill()
             raise
-        if proc.returncode < 0:
+        if proc.returncode:
             print('Game crashed!', file=sys.stderr)
             return
         reader = csv.DictReader(proc.stdout)