Fix of pos/t2454

"_" type paraeters need to be given fresh names.

1 files changed, 19 insertions, 0 deletions

diff --git a/tests/pos/t2421b_pos.scala b/tests/pos/t2421b_pos.scala
new file mode 100644
index 000000000..679b8a8d6
--- /dev/null
+++ b/tests/pos/t2421b_pos.scala
@@ -0,0 +1,19 @@
+object Test {
+  class A
+  class B
+  class C
+  class F[X]
+
+  def f(implicit aa: F[A]) = println(aa)
+
+  implicit def a : F[A] = new F[A]()
+  implicit def b[X <: B]: Test.F[X] = new F[X]()
+
+  f
+}
+/* bug:
+error: ambiguous implicit values:
+ both method b in object Test1 of type [X <: Test1.B]Test1.F[X]
+ and method a in object Test1 of type => Test1.F[Test1.A]
+ match expected type Test1.F[Test1.A]
+*/