[Fix] ExportMap: do not crash when tsconfig lacks .compilerOptions

Fixes #2067

CHANGELOG.md

@@ -8,6 +8,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 
 ### Fixed
 - [`newline-after-import`]: fix crash with `export {}` syntax ([#2063], [#2056], thanks [@ljharb])
+- `ExportMap`: do not crash when tsconfig lacks `.compilerOptions` ([#2067], thanks [@ljharb])
 
 ## [2.23.0] - 2021-05-13
 
@@ -1006,6 +1007,7 @@ for info on changes for earlier releases.
 [#211]: https://github.com/benmosher/eslint-plugin-import/pull/211
 [#164]: https://github.com/benmosher/eslint-plugin-import/pull/164
 [#157]: https://github.com/benmosher/eslint-plugin-import/pull/157
+[#2067]: https://github.com/benmosher/eslint-plugin-import/issues/2067
 [#2056]: https://github.com/benmosher/eslint-plugin-import/issues/2056
 [#2063]: https://github.com/benmosher/eslint-plugin-import/issues/2063
 [#1965]: https://github.com/benmosher/eslint-plugin-import/issues/1965

src/ExportMap.js

@@ -472,7 +472,7 @@ ExportMap.parse = function (path, content, context) {
       tsConfigCache.set(cacheKey, tsConfig);
     }
 
-    return tsConfig !== null ? tsConfig.compilerOptions.esModuleInterop : false;
+    return tsConfig && tsConfig.compilerOptions ? tsConfig.compilerOptions.esModuleInterop : false;
   }
 
   ast.body.forEach(function (n) {

tests/src/rules/default.js

@@ -258,6 +258,26 @@ context('TypeScript', function () {
           },
           errors: ['No default export found in imported module "./typescript-export-as-default-namespace".'],
         }),
+        test({
+          code: `import Foo from "./typescript-export-as-default-namespace"`,
+          parser: parser,
+          settings: {
+            'import/parsers': { [parser]: ['.ts'] },
+            'import/resolver': { 'eslint-import-resolver-typescript': true },
+          },
+          parserOptions: {
+            tsconfigRootDir: path.resolve(__dirname, '../../files/typescript-no-compiler-options/'),
+          },
+          errors: [
+            {
+              message: 'No default export found in imported module "./typescript-export-as-default-namespace".',
+              line: 1,
+              column: 8,
+              endLine: 1,
+              endColumn: 11,
+            },
+          ],
+        }),
       ],
     });
   });