Create test variants where delambdafication alters signatures.

This commit includes several tests where there's a variation in
signatures between inline delambdafication and method based
delambdafication.

4 files changed, 32 insertions, 0 deletions

diff --git a/test/files/neg/delambdafy_t6260_method.check b/test/files/neg/delambdafy_t6260_method.check
new file mode 100644
index 0000000000..f5cd6947d1
--- /dev/null
+++ b/test/files/neg/delambdafy_t6260_method.check
@@ -0,0 +1,13 @@
+delambdafy_t6260_method.scala:3: error: bridge generated for member method apply: (bx: Object)Object in class map$extension1
+which overrides method apply: (v1: Object)Object in trait Function1
+clashes with definition of the member itself;
+both have erased type (bx: Object)Object
+    ((bx: Box[X]) => new Box(f(bx.x)))(this)
+                  ^
+delambdafy_t6260_method.scala:8: error: bridge generated for member method apply: (bx: Object)Object in class map21
+which overrides method apply: (v1: Object)Object in trait Function1
+clashes with definition of the member itself;
+both have erased type (bx: Object)Object
+    ((bx: Box[X]) => new Box(f(bx.x)))(self)
+                  ^
+two errors found
diff --git a/test/files/neg/delambdafy_t6260_method.flags b/test/files/neg/delambdafy_t6260_method.flags
new file mode 100644
index 0000000000..48b438ddf8
--- /dev/null
+++ b/test/files/neg/delambdafy_t6260_method.flags
@@ -0,0 +1 @@
+-Ydelambdafy:method
diff --git a/test/files/neg/delambdafy_t6260_method.scala b/test/files/neg/delambdafy_t6260_method.scala
new file mode 100644
index 0000000000..93b5448227
--- /dev/null
+++ b/test/files/neg/delambdafy_t6260_method.scala
@@ -0,0 +1,17 @@
+class Box[X](val x: X) extends AnyVal {
+  def map[Y](f: X => Y): Box[Y] =
+    ((bx: Box[X]) => new Box(f(bx.x)))(this)
+}
+
+object Test {
+  def map2[X, Y](self: Box[X], f: X => Y): Box[Y] =
+    ((bx: Box[X]) => new Box(f(bx.x)))(self)
+
+  def main(args: Array[String]) {
+    val f = (x: Int) => x + 1
+    val g = (x: String) => x + x
+
+    map2(new Box(42), f)
+    new Box("abc") map g
+  }
+}
diff --git a/test/files/neg/t6260.flags b/test/files/neg/t6260.flags
new file mode 100644
index 0000000000..2349d8294d
--- /dev/null
+++ b/test/files/neg/t6260.flags
@@ -0,0 +1 @@
+-Ydelambdafy:inline