1 files changed, 18 insertions, 0 deletions
diff --git a/tests/untried/pos/t2782.scala b/tests/untried/pos/t2782.scala
new file mode 100644
index 000000000..ab12aaf1f
--- /dev/null
+++ b/tests/untried/pos/t2782.scala
@@ -0,0 +1,18 @@
+import scala.{collection => sc}
+
+object Test {
+  trait Foo[T]
+
+  // Haven't managed to repro without using a CanBuild or CanBuildFrom implicit parameter
+  implicit def MapFoo[A, B, M[A, B] <: sc.Map[A,B]](implicit aFoo: Foo[A], bFoo: Foo[B], cb: sc.generic.CanBuild[(A, B), M[A, B]]) = new Foo[M[A,B]] {}
+  implicit object Tuple2IntIntFoo extends Foo[(Int, Int)] // no difference if this line is uncommented
+  implicit def Tuple2Foo[A, B] = new Foo[(A, B)] {}       // nor this one
+
+  implicitly[Foo[(Int, Int)]]
+}
+
+class A {
+  def x[N[X] >: M[X], M[_], G](n: N[G], m: M[G]) = null
+
+  x(Some(3), Seq(2))
+}