workaround V8 RegExp bug (#3453)

fixes #3434

1 files changed, 22 insertions, 5 deletions

diff --git a/lib/output.js b/lib/output.js
index 2d0dc53f..af0cdc4b 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -136,8 +136,7 @@ function OutputStream(options) {
 
     function make_string(str, quote) {
         var dq = 0, sq = 0;
-        str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
-          function(s, i) {
+        str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g, function(s, i) {
             switch (s) {
               case '"': ++dq; return '"';
               case "'": ++sq; return "'";
@@ -599,7 +598,6 @@ function OutputStream(options) {
             }
             print(encoded);
         },
-        encode_string   : encode_string,
         next_indent     : next_indent,
         with_indent     : with_indent,
         with_block      : with_block,
@@ -1383,8 +1381,27 @@ function OutputStream(options) {
         if (regexp.raw_source) {
             str = "/" + regexp.raw_source + str.slice(str.lastIndexOf("/"));
         }
-        str = output.to_utf8(str);
-        output.print(str);
+        output.print(output.to_utf8(str).replace(/\\(?:\0(?![0-9])|[^\0])/g, function(seq) {
+            switch (seq[1]) {
+              case "\n": return "\\n";
+              case "\r": return "\\r";
+              case "\t": return "\t";
+              case "\b": return "\b";
+              case "\f": return "\f";
+              case "\0": return "\0";
+              case "\x0B": return "\v";
+              case "\u2028": return "\\u2028";
+              case "\u2029": return "\\u2029";
+              default: return seq;
+            }
+        }).replace(/[\n\r\u2028\u2029]/g, function(c) {
+            switch (c) {
+              case "\n": return "\\n";
+              case "\r": return "\\r";
+              case "\u2028": return "\\u2028";
+              case "\u2029": return "\\u2029";
+            }
+        }));
         var p = output.parent();
         if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self)
             output.print(" ");