fix: limit match length of email regular expression

closes #8

Author: llimllib

lib/index.js

@@ -141,7 +141,13 @@ function transformGfmAutolinkLiterals(tree) {
     tree,
     [
       [/(https?:\/\/|www(?=\.))([-.\w]+)([^ \t\r\n]*)/gi, findUrl],
-      [/([-.\w+]+)@([-\w]+(?:\.[-\w]+)+)/g, findEmail]
+      // Use {1,1024} instead of `+` to avoid pathological regular expression
+      // behavior; see
+      // https://github.com/syntax-tree/mdast-util-gfm-autolink-literal/issues/8
+      [
+        /([-.\w+]{1,1024})@([-\w]{1,1024}(?:\.[-\w]{1,1024}){1,1024})/g,
+        findEmail
+      ]
     ],
     {ignore: ['link', 'linkReference']}
   )