Fix for rebase

Author: kdy1

crates/swc_ecma_minifier/src/compress/optimize/sequences.rs

@@ -951,6 +951,8 @@ where
                 {
                     log_abort!("Undeclared");
                     return false;
+                }
+
                 if let Some(usage) = self.data.vars.get(&e.to_id()) {
                     if usage.reassigned() {
                         log_abort!("Reaasigned");