From f74c1f3e5a117c22aa87a2754715066cb8dfe0fe Mon Sep 17 00:00:00 2001
From: magic-akari <akari.ccino@gmail.com>
Date: Sat, 12 Oct 2024 15:05:49 +0800
Subject: [PATCH] fix(es/lints): Correct the false positive error of TS2309
 (#9635)

**Related issue:**

- Closes https://github.com/swc-project/swc/issues/9632
---
 .changeset/wicked-windows-occur.md                     | 6 ++++++
 crates/swc_ecma_lints/src/rules/duplicate_exports.rs   | 4 +++-
 crates/swc_ecma_lints/tests/pass/issue-9632/1/input.ts | 9 +++++++++
 3 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/wicked-windows-occur.md
 create mode 100644 crates/swc_ecma_lints/tests/pass/issue-9632/1/input.ts

diff --git a/.changeset/wicked-windows-occur.md b/.changeset/wicked-windows-occur.md
new file mode 100644
index 000000000000..49e23d989eb9
--- /dev/null
+++ b/.changeset/wicked-windows-occur.md
@@ -0,0 +1,6 @@
+---
+swc_core: patch
+swc_ecma_lints: patch
+---
+
+fix(es/lints): Correct the false positive error of TS2309
diff --git a/crates/swc_ecma_lints/src/rules/duplicate_exports.rs b/crates/swc_ecma_lints/src/rules/duplicate_exports.rs
index fca3ffdd2fb1..942990e04a3b 100644
--- a/crates/swc_ecma_lints/src/rules/duplicate_exports.rs
+++ b/crates/swc_ecma_lints/src/rules/duplicate_exports.rs
@@ -1,4 +1,4 @@
-use std::collections::hash_map::Entry;
+use std::{collections::hash_map::Entry, mem};
 
 use swc_atoms::JsWord;
 use swc_common::{collections::AHashMap, errors::HANDLER, Span};
@@ -82,7 +82,9 @@ impl Visit for DuplicateExports {
 
     fn visit_ts_module_decl(&mut self, d: &TsModuleDecl) {
         if !d.declare {
+            let old = mem::take(self);
             d.visit_children_with(self);
+            *self = old;
         }
     }
 
diff --git a/crates/swc_ecma_lints/tests/pass/issue-9632/1/input.ts b/crates/swc_ecma_lints/tests/pass/issue-9632/1/input.ts
new file mode 100644
index 000000000000..ab9852c08aa8
--- /dev/null
+++ b/crates/swc_ecma_lints/tests/pass/issue-9632/1/input.ts
@@ -0,0 +1,9 @@
+import * as meta from "./meta.js";
+
+function nameof(obj: unknown) { }
+
+namespace nameof {
+    export import version = meta.version;
+}
+
+export = nameof;
\ No newline at end of file