From f144082a605de6799ffc1c6e62212d3275e49631 Mon Sep 17 00:00:00 2001
From: underfin <likui.underfin@gmail.com>
Date: Mon, 15 Jul 2024 19:37:12 +0800
Subject: [PATCH] fix(minifier): RemoveDeadCode should visit nested expression
 (#4268)

---
 crates/oxc_minifier/src/ast_passes/remove_dead_code.rs | 1 +
 crates/oxc_minifier/tests/oxc/remove_dead_code.rs      | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/crates/oxc_minifier/src/ast_passes/remove_dead_code.rs b/crates/oxc_minifier/src/ast_passes/remove_dead_code.rs
index d857169c29eba..450f47b781587 100644
--- a/crates/oxc_minifier/src/ast_passes/remove_dead_code.rs
+++ b/crates/oxc_minifier/src/ast_passes/remove_dead_code.rs
@@ -26,6 +26,7 @@ impl<'a> VisitMut<'a> for RemoveDeadCode<'a> {
     fn visit_expression(&mut self, expr: &mut Expression<'a>) {
         self.fold_conditional_expression(expr);
         self.fold_logical_expression(expr);
+        walk_mut::walk_expression(self, expr);
     }
 }
 
diff --git a/crates/oxc_minifier/tests/oxc/remove_dead_code.rs b/crates/oxc_minifier/tests/oxc/remove_dead_code.rs
index fc1fc41be0295..13a71266b0541 100644
--- a/crates/oxc_minifier/tests/oxc/remove_dead_code.rs
+++ b/crates/oxc_minifier/tests/oxc/remove_dead_code.rs
@@ -62,6 +62,12 @@ fn dce_if_statement() {
         ",
         "{foo; return }",
     );
+
+    // nested expression
+    test(
+        "const a = { fn: function() { if (true) { foo; } } }",
+        "const a = { fn: function() { { foo; } } }",
+    );
 }
 
 #[test]