A simple test shows that this bug is in Rust std library. https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=a8982ed52005c4560bc695ab0fb1d

A simple test shows that this bug is in Rust std library. https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=a8982ed52005c4560bc695ab0fb1daed https://play.rust-lang.org/?version=stable&mode=debug&editio... Report the issue in https://github.com/rust-lang/rust/issues/83648 https://github.com/rust-lang/rust/issues/83648