Fix SI-5971.

When using `AbstractTransformed` abstract inner class in views in order
to force generating bridges, one must take care to push the corresponding
collection trait (such as `Iterable` or `Seq`) as far as possible to the
left in the linearization order -- otherwise, overridden methods from these
traits can override the already overridden methods in view. This was the
case with `takeWhile`.

2 files changed, 27 insertions, 0 deletions

diff --git a/test/files/run/t5971.check b/test/files/run/t5971.check
new file mode 100644
index 0000000000..0c36a1ff02
--- /dev/null
+++ b/test/files/run/t5971.check
@@ -0,0 +1,4 @@
+r,b
+r
+a,b
+r,a,b
\ No newline at end of file
diff --git a/test/files/run/t5971.scala b/test/files/run/t5971.scala
new file mode 100644
index 0000000000..dbd9beebb3
--- /dev/null
+++ b/test/files/run/t5971.scala
@@ -0,0 +1,23 @@
+
+
+
+
+
+/** When using `AbstractTransformed` abstract inner class in views in order
+ *  to force generating bridges, one must take care to push the corresponding
+ *  collection trait (such as `Iterable` or `Seq`) as far as possible to the
+ *  left in the linearization order -- otherwise, overridden methods from these
+ *  traits can override the already overridden methods in view. This was the
+ *  case with `takeWhile`.
+ *  Mind blowing, I know.
+ */
+object Test {
+  
+  def main(args: Array[String]) {
+    println("bar".view.reverse.filter(_ > 'a').mkString(","))
+    println("bar".view.reverse.take(1).mkString(","))
+    println("bar".view.reverse.dropWhile(_ > 'a').mkString(","))
+    println("bar".view.reverse.takeWhile(_ => true).mkString(","))
+  }
+  
+}