fix tree traversal on `AST_Do` (#3047)

fixes #3046

1 files changed, 26 insertions, 0 deletions

diff --git a/test/compress/hoist_props.js b/test/compress/hoist_props.js
index 90a7f1d8..b16f7425 100644
--- a/test/compress/hoist_props.js
+++ b/test/compress/hoist_props.js
@@ -716,3 +716,29 @@ issue_3021: {
     }
     expect_stdout: "2 2"
 }
+
+issue_3046: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a) {
+            do {
+                var b = {
+                    c: a++
+                };
+            } while (b.c && a);
+            return a;
+        }(0));
+    }
+    expect: {
+        console.log(function(a) {
+            do {
+                var b_c = a++;
+            } while (b_c && a);
+            return a;
+        }(0));
+    }
+    expect_stdout: "1"
+}