Fatal error: Unexpectedly found nil while unwrapping an Optional value

[PlutusCat]

Xcode 10.1
MacOS 10.14.1

I have some json code,and choose SwiftyJSON-Class , There will be a crash.

{
  "code" : "200",
  "message" : "匹配完成",
  "data" : {
    "stackTrace" : [
      {
        "nativeMethod" : false,
        "fileName" : "NullObject.java",
        "className" : "org.codehaus.groovy.runtime.NullObject",
        "lineNumber" : 60,
        "methodName" : "getProperty"
      },
      {
        "nativeMethod" : false,
        "fileName" : "InvokerHelper.java",
        "className" : "org.codehaus.groovy.runtime.InvokerHelper",
        "lineNumber" : 190,
        "methodName" : "getProperty"
      }
    ],
    "cause" : null,
    "localizedMessage" : "Cannot get property 'minimumAmount' on null object",
    "message" : "Cannot get property 'minimumAmount' on null object",
    "suppressed" : [

    ]
  }
}

On the FileRepresenter.swift In line No. 484, It's a null value.

// if needs cast
let cast = lang.basicTypesWithSpecialFetchingNeedsTypeCast[index]

[wangela]

+1 on this, also running on
Xcode 10.1
MacOS 10.14.1

Console also says
2018-12-04 10:48:23.151777-0800 JSONExport[14745:1985495] [default] Unable to load Info.plist exceptions (eGPUOverrides) (lldb)

[brianramirez]

I ran into this same issue with SwiftyJSON just now with my JSON structure. I think that the JSONExport tool is barfing with creating the Constructors for SwiftyJSON when the JSON has empty arrays. As soon as I provided values for my empty arrays, the tool works perfectly.