Fix bug where bundleMapQueue is not cleared after an error

src/bundle/lookup.js

@@ -1,7 +1,6 @@
 import coreLikelySubtags from "../core/likely_subtags";
 import coreRemoveLikelySubtags from "../core/remove_likely_subtags";
 import coreSubtags from "../core/subtags";
-import arrayForEach from "../util/array/for_each";
 
 /**
  * bundleLookup( minLanguageId )
@@ -17,19 +16,27 @@ export default function(Cldr, cldr, minLanguageId) {
     availableBundleMapQueue = Cldr._availableBundleMapQueue;
 
   if (availableBundleMapQueue.length) {
-    arrayForEach(availableBundleMapQueue, function(bundle) {
+    while (availableBundleMapQueue.length > 0) {
+      const bundle = availableBundleMapQueue.shift();
+      if (!bundle) {
+        break;
+      }
+
       var existing, maxBundle, minBundle, subtags;
       subtags = coreSubtags(bundle);
       maxBundle = coreLikelySubtags(Cldr, cldr, subtags);
+      if (typeof maxBundle === "undefined") {
+        throw new Error(`Could not find likelySubtags for ${bundle}`);
+      }
+
       minBundle = coreRemoveLikelySubtags(Cldr, cldr, maxBundle);
       minBundle = minBundle.join(Cldr.localeSep);
       existing = availableBundleMap[minBundle];
       if (existing && existing.length < bundle.length) {
         return;
       }
       availableBundleMap[minBundle] = bundle;
-    });
-    Cldr._availableBundleMapQueue = [];
+    }
   }
 
   return availableBundleMap[minLanguageId] || null;

test/unit/bundle/lookup.js

@@ -55,4 +55,35 @@ describe("Bundle Lookup", function() {
     sr = new Cldr("sr-RS");
     expect(sr.attributes.bundle).to.equal("sr");
   });
+
+  it("should remove problematic bundle from the global _availableBundleMapQueue on failure", function() {
+    Cldr.load(
+      {
+        main: { bg: {} } // valid
+      },
+      {
+        main: { xx: {} } // invalid
+      },
+      {
+        main: { sr: {} } // valid
+      }
+    );
+
+    expect(Cldr._availableBundleMapQueue).to.eql(["bg", "xx", "sr"]);
+
+    expect(() => {
+      // triggers the loading of bundle queue
+      new Cldr("bg");
+    }).to.throw();
+
+    expect(Cldr._availableBundleMapQueue).to.eql(["sr"]);
+
+    // the invalid bundle has been removed so we can load bg
+    new Cldr("bg");
+
+    // and sr, which will now trigger the loading of the rest of the queue
+    new Cldr("sr");
+
+    expect(Cldr._availableBundleMapQueue).to.eql([]);
+  });
 });