Fix #2160

clippy_lints/src/is_unit_expr.rs

@@ -132,6 +132,7 @@ fn is_unit_expr(expr: &Expr) -> Option<Span> {
 }
 
 fn check_last_stmt_in_block(block: &Block) -> bool {
+    if block.stmts.is_empty() { return false; }
     let final_stmt = &block.stmts[block.stmts.len() - 1];
 
 

tests/ui/is_unit_expr.rs

@@ -71,3 +71,7 @@ pub fn foo() -> i32 {
     };
     55
 }
+
+pub fn issue_2160() {
+    let x = {};
+}