fix corner case in reduce_vars (#4636)

2021-02-10 02:37:00 +00:00
parent c76481341c
commit 5ec82e5801
2 changed files with 67 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -9836,7 +9836,8 @@ merge(Compressor.prototype, {
                                }
                            } while (scope = scope.parent_scope);
                        }
-                    } else if (fixed.name && fixed.name.name == "await" && is_async(fixed)) {
+                    } else if (fixed.name && (fixed.name.name == "await" && is_async(fixed)
+                        || fixed.name.name == "yield" && is_generator(fixed))) {
                        single_use = false;
                    }
                    if (single_use) fixed.parent_scope = self.scope;