The crash will happen when you type something unexpected instance URL.
Example
```swift
let server = "mstdn.jp/"
var components = URLComponents()
components.scheme = "https"
components.host = server
components.path = "/api/v1/instance"
components.url! // 💥 error: Execution was interrupted, reason: EXC_BREAKPOINT (code=1, subcode=0x18c986650).
```
Env
A description of this package.