SI-8264 scala.collection.immutable.HashSet#- returns broken Set

Was an error in HashSet's handling of removal of an element when a HashTrieSet should turn into a HashSet1.

Also slightly modified HashMap's filter0 to more closely match HashSet (by adding the same comment).

1 files changed, 7 insertions, 0 deletions

diff --git a/test/junit/scala/collection/SetMapConsistencyTest.scala b/test/junit/scala/collection/SetMapConsistencyTest.scala
index 0d6f43db06..eed6007eef 100644
--- a/test/junit/scala/collection/SetMapConsistencyTest.scala
+++ b/test/junit/scala/collection/SetMapConsistencyTest.scala
@@ -507,4 +507,11 @@ class SetMapConsistencyTest {
       case _ => true
     })
   }
+  
+  @Test
+  def testSI8264() {
+    val hs = Set(-2147483648, 1, -45023380, -1, 1971207058, -54312241, -234243394) - -1
+    assert( hs.toList.toSet == hs )
+    assert( hs == hs.toList.toSet )
+  }
 }