From 23926ef2b8b56c135d91b72cdbf067acf6be114b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=B0=95=EB=8F=99=EC=9C=A4=20=28Donny=29?=
 <kdy1997.dev@gmail.com>
Date: Tue, 3 Sep 2024 05:58:52 +0900
Subject: [PATCH 1/2] fix

---
 crates/swc_ecma_minifier/src/pass/mangle_names/mod.rs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/crates/swc_ecma_minifier/src/pass/mangle_names/mod.rs b/crates/swc_ecma_minifier/src/pass/mangle_names/mod.rs
index 522cfc8ab03d..c755cba84502 100644
--- a/crates/swc_ecma_minifier/src/pass/mangle_names/mod.rs
+++ b/crates/swc_ecma_minifier/src/pass/mangle_names/mod.rs
@@ -35,11 +35,12 @@ pub(crate) fn mangle_names(
         chars,
     ));
 
-    let mut cache = RenameMap::default();
+    let mut cache = None;
 
     if let Some(mangle_cache) = &mangle_name_cache {
-        mangle_cache
-            .vars_cache(&mut |v| cache.extend(v.iter().map(|(k, v)| (k.clone(), v.clone()))));
+        let mut c = RenameMap::default();
+        mangle_cache.vars_cache(&mut |v| c.extend(v.iter().map(|(k, v)| (k.clone(), v.clone()))));
+        cache = Some(c);
     }
 
     program.visit_mut_with(&mut renamer(
@@ -61,7 +62,7 @@ pub(crate) fn mangle_names(
 struct ManglingRenamer {
     chars: Base54Chars,
     preserved: FxHashSet<Id>,
-    cache: RenameMap,
+    cache: Option<RenameMap>,
     mangle_name_cache: Option<Arc<dyn MangleCache>>,
 }
 
@@ -82,7 +83,7 @@ impl Renamer for ManglingRenamer {
     }
 
     fn get_cached(&self) -> Option<Cow<RenameMap>> {
-        Some(Cow::Borrowed(&self.cache))
+        self.cache.as_ref().map(Cow::Borrowed)
     }
 
     fn store_cache(&mut self, update: &RenameMap) {

From d82223cb3bb24eb5fc38876265bfb4db0e1c52b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Donny/=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1997.dev@gmail.com>
Date: Tue, 3 Sep 2024 05:59:59 +0900
Subject: [PATCH 2/2] Create gentle-coats-tie.md

---
 .changeset/gentle-coats-tie.md | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 .changeset/gentle-coats-tie.md

diff --git a/.changeset/gentle-coats-tie.md b/.changeset/gentle-coats-tie.md
new file mode 100644
index 000000000000..c4b8b2f52c7d
--- /dev/null
+++ b/.changeset/gentle-coats-tie.md
@@ -0,0 +1,6 @@
+---
+swc_core: patch
+swc_ecma_minifier: patch
+---
+
+fix(es/minifier): Fix name mangler