From b6a9178075e1c363921641e0769ed6fd8b739587 Mon Sep 17 00:00:00 2001
From: Dunqing <29533304+Dunqing@users.noreply.github.com>
Date: Fri, 20 Sep 2024 14:19:03 +0000
Subject: [PATCH] fix(isolated-declarations): don't collect references when
 `ExportNamedDeclaration` has source (#5926)

---
 crates/oxc_isolated_declarations/src/scope.rs                  | 3 ++-
 .../tests/fixtures/eliminate-imports.ts                        | 2 ++
 .../tests/snapshots/eliminate-imports.snap                     | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/oxc_isolated_declarations/src/scope.rs b/crates/oxc_isolated_declarations/src/scope.rs
index 5f2b9b5b4a364..69d0f1e96cb3b 100644
--- a/crates/oxc_isolated_declarations/src/scope.rs
+++ b/crates/oxc_isolated_declarations/src/scope.rs
@@ -137,7 +137,8 @@ impl<'a> Visit<'a> for ScopeTree<'a> {
     fn visit_export_named_declaration(&mut self, decl: &ExportNamedDeclaration<'a>) {
         if let Some(declaration) = &decl.declaration {
             walk_declaration(self, declaration);
-        } else {
+        } else if decl.source.is_none() {
+            // export { ... }
             for specifier in &decl.specifiers {
                 if let Some(name) = specifier.local.identifier_name() {
                     self.add_type_reference(name.clone());
diff --git a/crates/oxc_isolated_declarations/tests/fixtures/eliminate-imports.ts b/crates/oxc_isolated_declarations/tests/fixtures/eliminate-imports.ts
index a6bdc391eddf3..91534365f16a5 100644
--- a/crates/oxc_isolated_declarations/tests/fixtures/eliminate-imports.ts
+++ b/crates/oxc_isolated_declarations/tests/fixtures/eliminate-imports.ts
@@ -9,3 +9,5 @@ export const bar: (this: ThisType2) => void = function() {}
 import { type InferType1, type InferType2 } from 'infer';
 
 export type F<X extends InferType1> = X extends infer U extends InferType2 ? U : never
+
+export { Unused } from './unused';
\ No newline at end of file
diff --git a/crates/oxc_isolated_declarations/tests/snapshots/eliminate-imports.snap b/crates/oxc_isolated_declarations/tests/snapshots/eliminate-imports.snap
index 404f2992eafe2..f048d666716a3 100644
--- a/crates/oxc_isolated_declarations/tests/snapshots/eliminate-imports.snap
+++ b/crates/oxc_isolated_declarations/tests/snapshots/eliminate-imports.snap
@@ -12,3 +12,4 @@ export declare function foo(this: ThisType1 ): void;
 export declare const bar: (this: ThisType2 ) => void;
 import { type InferType1, type InferType2 } from "infer";
 export type F<X extends InferType1> = X extends infer U extends InferType2 ? U : never;
+export { Unused } from "./unused";