needless_return_with_question_mark FN

[samueltardieu]

Description

The following code should trigger needless_return_with_question_mark. Noticed while reviewing #16952.

fn expr_after_stmt() -> Result<(), ()> {
    return Err(())?;
    //~^ needless_return_with_question_mark
    Ok(())
}

@rustbot label +I-false-negative +C-bug
@rustbot claim

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