Discovered and disproved this unlikely truth:

  scala> (1 to 1 drop 1) == (1 to 1)
  res0: Boolean = true

It was introduced in r21349 which was to fix #2535, but led to #3529.
I humbly suggest we can't afford to introduce bugs of this severity in
the pursuit of corner cases such as Ranges which use Int.MaxValue as a
boundary. And looking at the patch I find the "after" code a lot harder
to follow. Closes #3529. Review by prokopec.

1 files changed, 12 insertions, 0 deletions

diff --git a/test/files/run/bug3529.scala b/test/files/run/bug3529.scala
new file mode 100644
index 0000000000..4d83bcfa22
--- /dev/null
+++ b/test/files/run/bug3529.scala
@@ -0,0 +1,12 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    assert(1 to 10 drop 10 isEmpty)
+    assert(1 until 10 drop 9 isEmpty)
+    assert(1 to 10 by 2 drop 5 isEmpty)
+
+    assert((1 to 10 drop 9) == Seq(10))
+    assert((1 until 10 drop 9) == Nil)
+
+    assert(Stream(1 to 10).flatten.toList == Stream(1 until 11).flatten.toList)
+  }
+}