Get RangeError when used with multiple mounts

[arifmanasiya]

Error Reported

RangeError: Maximum call stack size exceeded
at RegExp.test (native)
at ServerResponse.res.render [as _render]

Happens when I use multiple mounts.

e.g

var app = express()
...
app.use(helper('appName))
app.use(appRouter)

mount 1

server.use(app)

var admin = express()

//same name or different name does not matter
admin.use(helper('appName'))

//all routes fails in 'res.render()' call with above error
app.use(adminRouter)

mount 2

server.use(admin)