Only enable dot printing in debug mode

test/cctest/test-regexp.cc

Index: test/cctest/test-regexp.cc
diff --git a/test/cctest/test-regexp.cc b/test/cctest/test-regexp.cc
index a5c2127fac813413f89fe331e3194424d274b38c..a2b3c97d1af69cdc1cc9adcab7231b42b8457cac 100644
--- a/test/cctest/test-regexp.cc
+++ b/test/cctest/test-regexp.cc
@@ -337,10 +337,13 @@ static void Execute(const char* input,
   if (!v8::internal::ParseRegExp(&buffer, &result))
     return;
   RegExpNode* node = RegExpEngine::Compile(&result);
+  USE(node);
+#ifdef DEBUG
   if (dot_output) {
     RegExpEngine::DotPrint(input, node);
     exit(0);
   }
+#endif // DEBUG
 }