1 files changed, 57 insertions, 0 deletions
diff --git a/test/files/neg/userdefined_apply.scala b/test/files/neg/userdefined_apply.scala
new file mode 100644
index 0000000000..0a0d960b39
--- /dev/null
+++ b/test/files/neg/userdefined_apply.scala
@@ -0,0 +1,57 @@
+object ClashOverloadNoSig {
+  // error: overloaded method apply needs result type
+  private def apply(x: Int) = if (x > 0) new ClashOverloadNoSig(x) else apply("")
+
+  def apply(x: String): ClashOverloadNoSig = ???
+}
+
+case class ClashOverloadNoSig private(x: Int)
+
+object ClashRecNoSig {
+  // TODO: status quo is that the error refers to an overloaded method, which is actually recursive
+  // (we should have unlinked the symbol in the `if(suppress)` part of `applyUnapplyMethodCompleter`)
+  // error: recursive method apply needs result type
+  private def apply(x: Int) = if (x > 0) ClashRecNoSig(1) else ???
+}
+
+case class ClashRecNoSig private(x: Int)
+
+object NoClashNoSig {
+  // error: overloaded method apply needs result type
+  private def apply(x: Boolean) = if (x) NoClashNoSig(1) else ???
+}
+
+case class NoClashNoSig private(x: Int)
+
+object NoClashOverload {
+  // error: overloaded method apply needs result type
+  private def apply(x: Boolean) = if (x) NoClashOverload(1) else apply("")
+
+  def apply(x: String): NoClashOverload = ???
+}
+
+case class NoClashOverload private(x: Int)
+
+
+class BaseNCNSP[T] {
+  // TODO: suppress the following error
+  // error: NoClashNoSigPoly.type does not take parameters
+  def apply(x: T) = if (???) NoClashNoSigPoly(1) else ???
+}
+
+object NoClashNoSigPoly extends BaseNCNSP[Boolean]
+// TODO: position error at definition of apply in superclass instead of on case clss
+// error: recursive method apply needs result type
+case class NoClashNoSigPoly private(x: Int)
+
+
+class BaseCNSP[T] {
+  // TODO: suppress the following error
+  // error: ClashNoSigPoly.type does not take parameters
+  def apply(x: T) = if (???) ClashNoSigPoly(1) else ???
+}
+
+object ClashNoSigPoly extends BaseCNSP[Int]
+// TODO: position error at definition of apply in superclass instead of on case clss
+// error: recursive method apply needs result type
+case class ClashNoSigPoly private(x: Int)