From aa8d566b288eb0fdce24f3a51f8a65cf520c2133 Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Sun, 22 Aug 2021 08:54:35 -0700
Subject: [PATCH] [Fix] `no-duplicates`: avoid crash with empty `import type
 {}`

Fixes #2201
---
 CHANGELOG.md                     | 2 ++
 src/rules/no-duplicates.js       | 2 +-
 tests/src/rules/no-duplicates.js | 7 +++++++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4991b7a9a..59bcfb4be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 - `ExportMap`: Add default export when esModuleInterop is true and anything is exported ([#2184], thanks [@Maxim-Mazurok])
 - [`named`], [`namespace`]: properly set reexports on `export * as … from` ([#1998], [#2161], thanks [@ljharb])
 - [`no-duplicates`]: correctly handle case of mixed default/named type imports ([#2149], thanks [@GoodForOneFare], [@nwalters512])
+- [`no-duplicates`]: avoid crash with empty `import type {}` ([#2201], thanks [@ljharb])
 
 ### Changed
 - [Docs] `max-dependencies`: 📖 Document `ignoreTypeImports` option ([#2196], thanks [@himynameisdave])
@@ -1150,6 +1151,7 @@ for info on changes for earlier releases.
 [#211]: https://github.com/import-js/eslint-plugin-import/pull/211
 [#164]: https://github.com/import-js/eslint-plugin-import/pull/164
 [#157]: https://github.com/import-js/eslint-plugin-import/pull/157
+[#2201]: https://github.com/import-js/eslint-plugin-import/issues/2201
 [#2161]: https://github.com/import-js/eslint-plugin-import/issues/2161
 [#2118]: https://github.com/import-js/eslint-plugin-import/issues/2118
 [#2067]: https://github.com/import-js/eslint-plugin-import/issues/2067
diff --git a/src/rules/no-duplicates.js b/src/rules/no-duplicates.js
index 634410197..6e03fcaef 100644
--- a/src/rules/no-duplicates.js
+++ b/src/rules/no-duplicates.js
@@ -281,7 +281,7 @@ module.exports = {
 
     function getImportMap(n) {
       if (n.importKind === 'type') {
-        return n.specifiers[0].type === 'ImportDefaultSpecifier' ? defaultTypesImported : namedTypesImported;
+        return n.specifiers.length > 0 && n.specifiers[0].type === 'ImportDefaultSpecifier' ? defaultTypesImported : namedTypesImported;
       }
 
       return hasNamespace(n) ? nsImported : imported;
diff --git a/tests/src/rules/no-duplicates.js b/tests/src/rules/no-duplicates.js
index c6b355ab8..faf096ace 100644
--- a/tests/src/rules/no-duplicates.js
+++ b/tests/src/rules/no-duplicates.js
@@ -446,6 +446,13 @@ context('TypeScript', function() {
             code: "import type x from './foo'; import type {y} from './foo'",
             ...parserConfig,
           }),
+          test({
+            code: `
+              import type {} from './module';
+              import {} from './module2';
+            `,
+            ...parserConfig,
+          }),
         ],
         invalid: [
           test({