fix reference marking in for-in loops (#1535)

fixes #1533

1 files changed, 36 insertions, 0 deletions

diff --git a/test/compress/reduce_vars.js b/test/compress/reduce_vars.js
index e38c317b..87b1fc2e 100644
--- a/test/compress/reduce_vars.js
+++ b/test/compress/reduce_vars.js
@@ -589,3 +589,39 @@ inner_var_for_in: {
         x(1, b, c, d);
     }
 }
+
+issue_1533_1: {
+    options = {
+        collapse_vars: true,
+        reduce_vars: true,
+    }
+    input: {
+        var id = "";
+        for (id in {break: "me"})
+            console.log(id);
+    }
+    expect: {
+        var id = "";
+        for (id in {break: "me"})
+            console.log(id);
+    }
+}
+
+issue_1533_2: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        var id = "";
+        for (var id in {break: "me"})
+            console.log(id);
+        console.log(id);
+    }
+    expect: {
+        var id = "";
+        for (var id in {break: "me"})
+            console.log(id);
+        console.log(id);
+    }
+}