make node.js 6 happy

mathiasbynens · Sep 21, 2023 · 8501e5d · 8501e5d
1 parent 6cb420e
commit 8501e5d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/rewrite-pattern.js b/rewrite-pattern.js
@@ -495,7 +495,7 @@ const processCharacterClass = (
 	if (transformed) {
 		// If single chars already contains some astral character, regenerate (bmpOnly: true) will create valid regex strings
 		const bmpOnly = regenerateContainsAstral(singleChars);
-		const setStr = singleChars.toString({ ...regenerateOptions, bmpOnly: bmpOnly });
+		const setStr = singleChars.toString(Object.assign({}, regenerateOptions, { bmpOnly: bmpOnly }));
 
 		if (negative) {
 			if (config.useUnicodeFlag) {