#![allow(warnings)] use std::io::{BufRead, BufReader, Read, Write}; fn issue_81421<T: Read + Write>(mut stream: T) { //~ HELP consider introducing a `where` clause let initial_message = format!("Hello world"); let mut buffer: Vec<u8> = Vec::new(); let bytes_written = stream.write_all(initial_message.as_bytes()); let flush = stream.flush(); loop { let mut stream_reader = BufReader::new(&stream); //~^ ERROR the trait bound `&T: std::io::Read` is not satisfied [E0277] //~| HELP consider removing the leading `&`-reference //~| HELP consider changing this borrow's mutability stream_reader.read_until(b'\n', &mut buffer).expect("Reading into buffer failed"); //~^ ERROR the method `read_until` exists for struct `BufReader<&T>`, } } fn main() {}