fix escape analysis for AST_Yield

fixes #2565
2017-12-10 14:25:23 +08:00
parent 7fd4b66eaa
commit f778a0aa01
2 changed files with 41 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -681,7 +681,8 @@ merge(Compressor.prototype, {
            if (parent instanceof AST_Assign && parent.operator == "=" && node === parent.right
                || parent instanceof AST_Call && node !== parent.expression
                || parent instanceof AST_Exit && node === parent.value && node.scope !== d.scope
-                || parent instanceof AST_VarDef && node === parent.value) {
+                || parent instanceof AST_VarDef && node === parent.value
+                || parent instanceof AST_Yield && node === parent.value && node.scope !== d.scope) {
                d.escaped = true;
                return;
            } else if (parent instanceof AST_Array