module: fix require of imports with package map

Signed-off-by: lazerg <lazerg2@gmail.com>
Assisted-by: Claude Code

Author: lazerg

lib/internal/modules/cjs/loader.js

@@ -1523,7 +1523,7 @@ Module._resolveFilename = function(request, parent, isMain, options) {
   const conditions = (options?.conditions) || getCjsConditions();
 
   // Try package map resolution for bare specifiers (if --experimental-package-map is set)
-  if (!isRelative(request) && !path.isAbsolute(request)) {
+  if (request[0] !== '#' && !isRelative(request) && !path.isAbsolute(request)) {
     const resolved = tryPackageMapResolveCJS(request, parent, conditions);
     if (resolved !== undefined) {
       return resolved;

test/fixtures/package-map/root/package.json

@@ -3,5 +3,8 @@
   "type": "module",
   "exports": {
     ".": "./index.js"
+  },
+  "imports": {
+    "#root": "./index.js"
   }
 }

test/parallel/test-require-package-map.js

@@ -132,6 +132,22 @@ describe('CJS: --experimental-package-map', { concurrency: !process.env.TEST_PAR
       assert.strictEqual(status, 0, stderr);
     });
 
+    it('resolves package imports without consulting the map', () => {
+      const { status, stdout, stderr } = spawnSync(process.execPath, [
+        '--no-warnings',
+        '--experimental-package-map', packageMapPath,
+        '-e',
+        `const root = require('#root'); console.log(root.default);`,
+      ], {
+        cwd: fixtures.path('package-map/root'),
+        encoding: 'utf8',
+      });
+
+      assert.strictEqual(stderr, '');
+      assert.match(stdout, /root-package/);
+      assert.strictEqual(status, 0, stderr);
+    });
+
     it('throws when parent not in map', () => {
       const { status, stderr } = spawnSync(process.execPath, [
         '--no-warnings',