return the original content

lib/single-file/vendor/css-minifier.js

@@ -415,6 +415,7 @@ this.cssMinifier = this.cssMinifier || (() => {
 
 		let pattern;
 
+		const originalContent = content;
 		content = extractDataUrls(content, preservedTokens);
 		content = collectComments(content, comments);
 
@@ -738,7 +739,7 @@ this.cssMinifier = this.cssMinifier || (() => {
 		content = content.replace(REGEXP_TRIM, "");
 
 		if (preservedTokens.length > 1000) {
-			return content;
+			return originalContent;
 		}
 
 		// restore preserved tokens