报错，打不到断点

TypeError: Cannot read property ‘__methodCaller’ of undefined

    at Function.u.getMethodCaller (WAService.js:15)

    at WAService.js:16

    at d (WAService.js:16)

    at e (appservice?t=1544000708567:2422)

    at r.registerCallback.t (appservice?t=1544000708567:2422)

    at l.forEach.t (appservice?t=1544000708567:2422)

    at Array.forEach (<anonymous>)

    at appservice?t=1544000708567:2422

    at WebSocket.s.onmessage (appservice?t=1544000708567:2422)