fix(es/compat): Fix scoping of explicit-resource-management

crates/swc/tests/fixture/issues-8xxx/8020/input/.swcrc

@@ -0,0 +1,19 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "tsx": false
+        },
+        "loose": false,
+        "minify": {
+            "compress": false,
+            "mangle": false
+        },
+        "target": "es2022",
+    },
+    "module": {
+        "type": "es6"
+    },
+    "minify": false,
+    "isModule": true,
+}

crates/swc/tests/fixture/issues-8xxx/8020/input/1.js

@@ -0,0 +1,9 @@
+using foo = null
+
+const bar = 1
+
+console.log(baz())
+
+function baz() {
+    return bar
+}

crates/swc/tests/fixture/issues-8xxx/8020/output/1.js

@@ -0,0 +1,16 @@
+import { _ as _dispose } from "@swc/helpers/_/_dispose";
+import { _ as _using } from "@swc/helpers/_/_using";
+function baz() {
+    return bar;
+}
+try {
+    var _stack = [];
+    var foo = _using(_stack, null);
+    var bar = 1;
+    console.log(baz());
+} catch (_) {
+    var _error = _;
+    var _hasError = true;
+} finally{
+    _dispose(_stack, _error, _hasError);
+}

crates/swc_ecma_transforms_proposal/src/explicit_resource_management.rs

@@ -87,6 +87,10 @@ impl ExplicitResourceManagement {
                 Ok(stmt @ Stmt::Decl(Decl::Fn(..))) => {
                     new.push(T::from_stmt(stmt));
                 }
+                Ok(Stmt::Decl(Decl::Var(mut var))) => {
+                    var.kind = VarDeclKind::Var;
+                    try_body.push(Stmt::Decl(Decl::Var(var)));
+                }
                 Ok(stmt) => try_body.push(stmt),
                 Err(stmt) => match stmt.try_into_module_decl() {
                     Ok(ModuleDecl::ExportDefaultDecl(decl)) => {