From ade9e84421dcd6677ca7f07116dfc0fb073e1cba Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 12 Jun 2025 19:35:09 +0000
Subject: [PATCH 1/3] Initial plan for issue


From a7f0df5cb5e2c017a4f949e0889b1cbee5dc9d34 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 12 Jun 2025 23:34:43 +0000
Subject: [PATCH 2/3] Initial investigation into issue #61766

Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>
---
 .../fourslash/findAllRefsWithDeclareModule.ts     | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 tests/cases/fourslash/findAllRefsWithDeclareModule.ts

diff --git a/tests/cases/fourslash/findAllRefsWithDeclareModule.ts b/tests/cases/fourslash/findAllRefsWithDeclareModule.ts
new file mode 100644
index 0000000000000..6b7c9ede307f2
--- /dev/null
+++ b/tests/cases/fourslash/findAllRefsWithDeclareModule.ts
@@ -0,0 +1,15 @@
+/// <reference path="fourslash.ts" />
+
+////declare module '@bug/api/index' {
+////  export * from "@bug/api/miscFunctions";
+////}
+////declare module '@bug/api/miscFunctions' {
+////  export function /*1*/myFunction(testParam: string): Promise<any>;
+////}
+////
+////declare namespace bug.v0 {const api: typeof import('@bug/api/index')}
+////
+//////// test.ts
+////bug.v0.api./*2*/myFunction('test')
+
+verify.baselineFindAllReferences('1', '2');
\ No newline at end of file

From 8f480ef909f5053c1197f7dcb48c696a20b8f63b Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 12 Jun 2025 23:48:06 +0000
Subject: [PATCH 3/3] Fix Find References missing with declare module (#61766)

Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>
---
 src/services/findAllReferences.ts             | 25 +++++++++++++------
 .../findAllRefsWithDeclareModuleDuplicate.ts  | 23 +++++++++++++++++
 2 files changed, 41 insertions(+), 7 deletions(-)
 create mode 100644 tests/cases/fourslash/findAllRefsWithDeclareModuleDuplicate.ts

diff --git a/src/services/findAllReferences.ts b/src/services/findAllReferences.ts
index a2ed0feb795a7..395afdadf096d 100644
--- a/src/services/findAllReferences.ts
+++ b/src/services/findAllReferences.ts
@@ -1687,13 +1687,24 @@ export namespace Core {
                     scope = next;
                 }
             }
-        }
-
-        // If symbol.parent, this means we are in an export of an external module. (Otherwise we would have returned `undefined` above.)
-        // For an export of a module, we may be in a declaration file, and it may be accessed elsewhere. E.g.:
-        //     declare module "a" { export type T = number; }
-        //     declare module "b" { import { T } from "a"; export const x: T; }
-        // So we must search the whole source file. (Because we will mark the source file as seen, we we won't return to it when searching for imports.)
+        }
+
+        // If symbol.parent, this means we are in an export of an external module. (Otherwise we would have returned `undefined` above.)
+        // For an export of a module, we may be in a declaration file, and it may be accessed elsewhere. E.g.:
+        //     declare module "a" { export type T = number; }
+        //     declare module "b" { import { T } from "a"; export const x: T; }
+        // So we must search the whole source file. (Because we will mark the source file as seen, we we won't return to it when searching for imports.)
+        // However, for declare modules, the exports are globally accessible and can be used from any file, so we should do a global search.
+        if (exposedByParent && parent && isExternalModuleSymbol(parent)) {
+            // Check if this is a declare module by examining the declarations
+            const isInDeclareModule = parent.declarations?.some(decl => 
+                isModuleDeclaration(decl) && (decl.flags & NodeFlags.GlobalAugmentation) === 0
+            );
+            if (isInDeclareModule) {
+                // For declare modules, do a global search since their exports can be accessed from anywhere
+                return undefined;
+            }
+        }
         return exposedByParent ? scope!.getSourceFile() : scope; // TODO: GH#18217
     }
 
diff --git a/tests/cases/fourslash/findAllRefsWithDeclareModuleDuplicate.ts b/tests/cases/fourslash/findAllRefsWithDeclareModuleDuplicate.ts
new file mode 100644
index 0000000000000..68edae355437e
--- /dev/null
+++ b/tests/cases/fourslash/findAllRefsWithDeclareModuleDuplicate.ts
@@ -0,0 +1,23 @@
+/// <reference path="fourslash.ts" />
+
+////declare module '@bug/api/index' {
+////  export * from "@bug/api/miscFunctions";
+////}
+////declare module '@bug/api/miscFunctions' {
+////  export function /*1*/myFunction(testParam: string): Promise<any>;
+////}
+////
+////declare namespace bug.v0 {const api: typeof import('@bug/api/index')}
+
+////declare module '@bug/api/index' {
+////  export * from "@bug/api/miscFunctions";
+////}
+////declare module '@bug/api/miscFunctions' {
+////  export function /*2*/myFunction(testParam: string): Promise<any>;
+////}
+////
+////declare namespace bug.v0 {const api: typeof import('@bug/api/index')}
+
+////bug.v0.api./*3*/myFunction('test')
+
+verify.baselineFindAllReferences('1', '2', '3');
\ No newline at end of file