1 files changed, 36 insertions, 0 deletions
diff --git a/tests/bugs1810/502807/TestCollectors.java b/tests/bugs1810/502807/TestCollectors.java
new file mode 100644
index 000000000..323fb76ce
--- /dev/null
+++ b/tests/bugs1810/502807/TestCollectors.java
@@ -0,0 +1,36 @@
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class TestCollectors {
+    Set<Integer> ids;
+
+    public TestCollectors(Set<Inner> inners) {
+        ids = inners.stream().collect(Collectors.toList(Inner::getId));
+//        ids = inners.stream().map(Inner::getId).collect(Collectors.toSet());
+    } 
+
+    public static void main() {
+        Set<Inner> inners = new HashSet<>();
+        inners.add(new Inner(1, "a"));
+        inners.add(new Inner(1, "a"));
+
+        new TestCollectors(inners);
+    }
+
+
+    public static class Inner {
+        private int id;
+        private String name;
+
+        public Inner(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        public int getId() { return id; }
+
+        public String getName() { return name; }
+    }
+}
+