[eslint-module-utils]: when parser settings are not an array, throw a…

… better error message Fixes import-js#1149.
ljharb · Aug 2, 2018 · 2d4f651 · 2d4f651
1 parent 0336ef9
commit 2d4f651
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/utils/ignore.js b/utils/ignore.js
@@ -24,8 +24,11 @@ function makeValidExtensionSet(settings) {
   // all alternate parser extensions are also valid
   if ('import/parsers' in settings) {
     for (let parser in settings['import/parsers']) {
-      settings['import/parsers'][parser]
-        .forEach(ext => exts.add(ext))
+      const parserSettings = settings['import/parsers'][parser]
+      if (!Array.isArray(parserSettings)) {
+        throw new TypeError('"settings" for ' + parser + ' must be an array')
+      }
+      parserSettings.forEach(ext => exts.add(ext))
     }
   }