enhance dead_code (#3849)

2020-05-05 22:02:35 +01:00
parent 66ab2df97f
commit 34ead0430b
2 changed files with 22 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -7670,6 +7670,11 @@ merge(Compressor.prototype, {
                        if (is_reachable(scope, [ def ])) break;
                        def.fixed = false;
                        return strip_assignment();
+                    } else if (parent instanceof AST_VarDef) {
+                        if (parent.name.definition() !== def) continue;
+                        if (in_try(level, parent)) break;
+                        def.fixed = false;
+                        return strip_assignment();
                    }
                } while (parent instanceof AST_Binary && parent.right === node
                    || parent instanceof AST_Sequence && parent.tail_node() === node