7 files changed, 125 insertions, 0 deletions
diff --git a/test/files/neg/t8300-overloading.check b/test/files/neg/t8300-overloading.check
new file mode 100644
index 0000000000..edd34d44bd
--- /dev/null
+++ b/test/files/neg/t8300-overloading.check
@@ -0,0 +1,7 @@
+t8300-overloading.scala:15: error: double definition:
+def foo(name: Test.u.Name): Nothing at line 14 and
+def foo(name: Test.u.TermName): Nothing at line 15
+have same type after erasure: (name: Universe#NameApi)Nothing
+  def foo(name: TermName) = ???
+      ^
+one error found
diff --git a/test/files/neg/t8300-overloading.scala b/test/files/neg/t8300-overloading.scala
new file mode 100644
index 0000000000..eb393155a0
--- /dev/null
+++ b/test/files/neg/t8300-overloading.scala
@@ -0,0 +1,16 @@
+// cf. pos/t8300-overloading.scala
+trait Universe {
+  type Name >: Null <: AnyRef with NameApi
+  trait NameApi
+
+  type TermName >: Null <: Name with TermNameApi
+  trait TermNameApi extends NameApi
+}
+
+object Test extends App {
+  val u: Universe = ???
+  import u._
+
+  def foo(name: Name) = ???
+  def foo(name: TermName) = ???
+}
+\ No newline at end of file
diff --git a/test/files/pos/t8300-conversions-a.scala b/test/files/pos/t8300-conversions-a.scala
new file mode 100644
index 0000000000..248a8b73b2
--- /dev/null
+++ b/test/files/pos/t8300-conversions-a.scala
@@ -0,0 +1,23 @@
+// cf. pos/t8300-conversions-b.scala
+trait Universe {
+  type Symbol >: Null <: AnyRef with SymbolApi
+  trait SymbolApi
+
+  type TypeSymbol >: Null <: Symbol with TypeSymbolApi
+  trait TypeSymbolApi extends SymbolApi
+
+  type FreeTypeSymbol >: Null <: TypeSymbol with FreeTypeSymbolApi
+  trait FreeTypeSymbolApi extends TypeSymbolApi
+
+  implicit class CompatibleSymbol(sym: Symbol) {
+    def asFreeType: FreeTypeSymbol = ???
+  }
+}
+
+object Test extends App {
+  val u: Universe = ???
+  import u._
+
+  val sym: Symbol = ???
+  sym.asFreeType
+}
+\ No newline at end of file
diff --git a/test/files/pos/t8300-conversions-b.scala b/test/files/pos/t8300-conversions-b.scala
new file mode 100644
index 0000000000..0524ee3683
--- /dev/null
+++ b/test/files/pos/t8300-conversions-b.scala
@@ -0,0 +1,23 @@
+// cf. pos/t8300-conversions-a.scala
+trait Universe {
+  type Symbol >: Null <: AnyRef with SymbolApi
+  trait SymbolApi
+
+  type TypeSymbol >: Null <: TypeSymbolApi with Symbol
+  trait TypeSymbolApi extends SymbolApi
+
+  type FreeTypeSymbol >: Null <: FreeTypeSymbolApi with TypeSymbol
+  trait FreeTypeSymbolApi extends TypeSymbolApi
+
+  implicit class CompatibleSymbol(sym: Symbol) {
+    def asFreeType: FreeTypeSymbol = ???
+  }
+}
+
+object Test extends App {
+  val u: Universe = ???
+  import u._
+
+  val sym: Symbol = ???
+  sym.asFreeType
+}
+\ No newline at end of file
diff --git a/test/files/pos/t8300-overloading.scala b/test/files/pos/t8300-overloading.scala
new file mode 100644
index 0000000000..ae9699ab86
--- /dev/null
+++ b/test/files/pos/t8300-overloading.scala
@@ -0,0 +1,16 @@
+// cf. neg/t8300-overloading.scala
+trait Universe {
+  type Name >: Null <: AnyRef with NameApi
+  trait NameApi
+
+  type TermName >: Null <: TermNameApi with Name
+  trait TermNameApi extends NameApi
+}
+
+object Test extends App {
+  val u: Universe = ???
+  import u._
+
+  def foo(name: Name) = ???
+  def foo(name: TermName) = ???
+}
+\ No newline at end of file
diff --git a/test/files/pos/t8300-patmat-a.scala b/test/files/pos/t8300-patmat-a.scala
new file mode 100644
index 0000000000..4421c0a15e
--- /dev/null
+++ b/test/files/pos/t8300-patmat-a.scala
@@ -0,0 +1,20 @@
+// cf. pos/t8300-patmat-b.scala
+trait Universe {
+  type Name >: Null <: AnyRef with NameApi
+  trait NameApi
+
+  type TermName >: Null <: Name with TermNameApi
+  trait TermNameApi extends NameApi
+}
+
+object Test extends App {
+  val u: Universe = ???
+  import u._
+
+  locally {
+    val ScalaName: TermName = ???
+    ??? match {
+      case ScalaName => ???
+    }
+  }
+}
+\ No newline at end of file
diff --git a/test/files/pos/t8300-patmat-b.scala b/test/files/pos/t8300-patmat-b.scala
new file mode 100644
index 0000000000..c01aeb912d
--- /dev/null
+++ b/test/files/pos/t8300-patmat-b.scala
@@ -0,0 +1,20 @@
+// cf. pos/t8300-patmat-a.scala
+trait Universe {
+  type Name >: Null <: AnyRef with NameApi
+  trait NameApi
+
+  type TermName >: Null <: TermNameApi with Name
+  trait TermNameApi extends NameApi
+}
+
+object Test extends App {
+  val u: Universe = ???
+  import u._
+
+  locally {
+    val ScalaName: TermName = ???
+    ??? match {
+      case ScalaName => ???
+    }
+  }
+}
+\ No newline at end of file