Config.Validate() does not always return error with type govalidator.Errors.

Example

# ...

  plmnList:
  - mcc: "208 " # <-- trailing whitespace
    mnc: "93 " # <-- trailing whitespace

#...

Config.Validate() returns type *errors.errorString but ReadConfig() crashes because of wrong type assertion in pkg/factory/factory.go:64.

Solution

To fix this problem, I added type switches and remains original behavior with type govalidator.Errors. Other type of error, print error message with Error() in native Error interface.