duplicates:

• SR-10445 EXC_BAD_INSTRUCTION when accessing property compiled with Xcode 10.2

Issue Description:

This originated from a discussion on the forums: https://forums.swift.org/t/exc-breakpoint-when-creating-array-with-specific-types/24060

Given WrappingStruct which contains two properties, an SingleValueEnum and a Date. This causes an EXC_BREAKPOINT crash when run in the debugger.

This crash seems to be closely tied to the types used and the exact structure created. It can be resolved via any of the below
a.) Adding a second case to the enum
b.) Changing the associated value from TimeZone to String
c.) Adding a third property to the struct
d.) Removing the enum property from the struct

Quinn helped me to boil my example down in the forum post to an even smaller test case.

```
import Foundation

enum SingleValueEnum {
case timezone(TimeZone)
}

struct WrappingStruct_Fails {
let enumValue: SingleValueEnum
let date: Date
}

func main() {
let fails = [WrappingStruct_Fails]()
print("fails: (fails)")
}

main()

```