v1.4.2

Fix line regex creation

lib/parser.js

@@ -574,28 +574,30 @@ class Parser {
         this.__regexes[_key_line] = [];
 
         for (var _i = 0; _i < _entry.length; _i++) {
-          var _regex_original = new RE2(_entry[_i]);
+          var _regex = _entry[_i];
 
           // Build 'line' alternative?
           if (LINE_REGEXES.includes(_key)) {
-            var _regex_line = this.__buildLineRegex(_regex_original);
+            var _regex_line = this.__buildLineRegex(_regex);
 
             this.__regexes[_key_line].push(_regex_line);
           }
 
-          this.__regexes[_key].push(_regex_original);
+          this.__regexes[_key].push(
+            new RE2(_regex)
+          );
         }
       } else {
-        var _regex_original = new RE2(_entry);
+        var _regex = _entry;
 
         // Build 'line' alternative?
         if (LINE_REGEXES.includes(_key)) {
-          var _regex_line = this.__buildLineRegex(_regex_original);
+          var _regex_line = this.__buildLineRegex(_regex);
 
           this.__regexes[_key_line] = _regex_line;
         }
 
-        this.__regexes[_key] = _regex_original;
+        this.__regexes[_key] = new RE2(_regex);
       }
     }
   }
@@ -610,6 +612,10 @@ class Parser {
   __buildLineRegex(regex) {
     // A 'line' regex will capture not only inner groups, but also the line \
     //   itself
+    // Important: `regex` must be a raw regular expression literal, not an RE2 \
+    //   instance. It seems that under some inexplicable circumstances, \
+    //   the RE2 instance sometimes doesn't have its `source` and `flags` \
+    //   properties correctly populated.
     var _source = `(${regex.source})`;
     var _flags  = regex.flags;
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "email-forward-parser",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "Parses forwarded emails and extract content",
   "author": "Eliott Vincent <eliott@crisp.chat>",
   "main": "lib/index.js",