Updated the project.

my-app/node_modules/body-parser/lib/types/json.js

@@ -39,6 +39,9 @@ module.exports = json
 
 var FIRST_CHAR_REGEXP = /^[\x20\x09\x0a\x0d]*([^\x20\x09\x0a\x0d])/ // eslint-disable-line no-control-regex
 
+var JSON_SYNTAX_CHAR = '#'
+var JSON_SYNTAX_REGEXP = /#+/g
+
 /**
  * Create a middleware to parse JSON bodies.
  *
@@ -152,15 +155,23 @@ function json (options) {
 
 function createStrictSyntaxError (str, char) {
   var index = str.indexOf(char)
-  var partial = index !== -1
-    ? str.substring(0, index) + '#'
-    : ''
+  var partial = ''
+
+  if (index !== -1) {
+    partial = str.substring(0, index) + JSON_SYNTAX_CHAR
+
+    for (var i = index + 1; i < str.length; i++) {
+      partial += JSON_SYNTAX_CHAR
+    }
+  }
 
   try {
     JSON.parse(partial); /* istanbul ignore next */ throw new SyntaxError('strict violation')
   } catch (e) {
     return normalizeJsonSyntaxError(e, {
-      message: e.message.replace('#', char),
+      message: e.message.replace(JSON_SYNTAX_REGEXP, function (placeholder) {
+        return str.substring(index, index + placeholder.length)
+      }),
       stack: e.stack
     })
   }