Crash with Accessibility mode enabled

[vlntb]

General information

• SDK/Library version: 5.4.1
• iOS Version and Device: 11.2.5, iPhone6s
• Integration type and version: as a library

Issue description

Brief:
Enable accessibility mode: Settings > General > Accessibility > VoiceOver > On.
Crash in CardIOPaymentViewController.

Details:
Overridden method 'description' is supposed to print out important / relevant values for CardIOPaymentViewController object in the debug output. Current implementation (sometimes) results in an infinite recursive call through caused by paymentDelegate.

On iOS 11 method 'description' is used by accessibility tool presumably to pull out a name of a screen from view-controller, which causes a crash from buffer overflow.