rust/tests/ui/author/blocks.stdout

if_chain! {
    if let ExprKind::Block(ref block) = expr.kind;
    if let Some(trailing_expr) = &block.expr;
    if block.stmts.len() == 0;
    then {
        // report your lint here
    }
}
if_chain! {
    then {
        // report your lint here
    }
}