Fix IDEA-177668 "Replace stream chain with loop" exception on unresolved collection type

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/afterCollector.java

@@ -113,6 +113,15 @@ public class Main {
       return integers;
   }
 
+  // Unresolved reference
+  void f(Collection<? extends Foo> c) {
+      R treeSet = new TreeSet();
+      for (Foo foo : c) {
+          treeSet.add(foo);
+      }
+      Set<Foo> uniqueDescriptors = treeSet;
+  }
+
   public static void main(String[] args) {
     new Main().testAveragingDouble("a", "bbb", null, "cc", "dd", "eedasfasdfs");
     new Main().testAveragingInt("a", "bbb", null, "cc", "dd", "eedasfasdfs");

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/streamToLoop/beforeCollector.java

@@ -46,6 +46,12 @@ public class Main {
     return IntStream.of(4, 2, 1).boxed().collect(Collectors.toCollection(TreeSet::new));
   }
 
+  // Unresolved reference
+  void f(Collection<? extends Foo> c) {
+    Set<Foo> uniqueDescriptors = c.stream()
+      .collect(Collectors.toCollection(() -> new TreeSet()));
+  }
+
   public static void main(String[] args) {
     new Main().testAveragingDouble("a", "bbb", null, "cc", "dd", "eedasfasdfs");
     new Main().testAveragingInt("a", "bbb", null, "cc", "dd", "eedasfasdfs");