壊れたUTFを無理やり突っ込んでread_line()でエラーを起こす

code:sh

% echo -e '\xff\xfe' | ./target/debug/guessing_game

数当てゲーム

数字を入力して

thread 'main' (2398038) panicked at src/main.rs:7:39:

読み込みに失敗: Error { kind: InvalidData, message: "stream did not contain valid UTF-8" }