SI-6440: Revert change to `TraversableLike.filterNot`

Commit df9f470f14262b9b1002f022c2620d8c38835805 introduced
a change to `TraversableLike.filterNot` which broke Stream
implementation that does override `filter` implementation
but does not override `filterNot` implementation. This shows
clearly that reusing code for strict and non-strict collections
is very problematic.

Added a test-case covering this problem.

Closes SI-6440.

Review by @retronym.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/run/t6440.scala b/test/files/run/t6440.scala
new file mode 100644
index 0000000000..2b690f31e1
--- /dev/null
+++ b/test/files/run/t6440.scala
@@ -0,0 +1,7 @@
+object Test {
+
+  def main(args: Array[String]): Unit = {
+    println(Stream.continually(()).filterNot(_ => false).take(2))
+  }
+
+}