A precondition was violated
static func preconditionViolated(message: String, file: String = #fileID, line: Int = #line) -> HTTPServerPipelineHandler.ConnectionStateError s8NIOHTTP125HTTPServerPipelineHandlerC20ConnectionStateErrorV20preconditionViolated7message4file4lineAESS_SSSitFZ What are these?7PCT9import NIOHTTP1struct ConnectionStateErrorfinal class HTTPServerPipelineHandlerA ChannelHandler that handles HTTP pipelining by buffering inbound data until a response has been sent.
@frozen struct StringA Unicode string value that is a collection of characters.
@frozen struct IntA signed integer value type.
var description: String { get }static func == (lhs: HTTPServerPipelineHandler.ConnectionStateError, rhs: HTTPServerPipelineHandler.ConnectionStateError) -> Bool func hash(into hasher: inout Hasher)