3 files changed, 47 insertions, 0 deletions
diff --git a/test/scaladoc/resources/SI-6511.scala b/test/scaladoc/resources/SI-6511.scala
new file mode 100644
index 0000000000..1f153caeb0
--- /dev/null
+++ b/test/scaladoc/resources/SI-6511.scala
@@ -0,0 +1,24 @@
+package test.scaladoc.template.diagrams
+
+/** @contentDiagram hideNodes "*Api" */
+trait X {
+  /** @template */
+  type Symbol >: Null <: SymbolApi
+
+  /** @template */
+  type TypeSymbol >: Null <: Symbol with TypeSymbolApi
+
+  /** @template */
+  type TermSymbol >: Null <: Symbol with TermSymbolApi
+
+  /** @template */
+  type MethodSymbol >: Null <: TermSymbol with MethodSymbolApi
+
+  trait SymbolApi { this: Symbol => def x: Int}
+  trait TermSymbolApi extends SymbolApi { this: TermSymbol => def y: Int}
+  trait TypeSymbolApi extends SymbolApi { this: TypeSymbol => def z: Int}
+  trait MethodSymbolApi extends TermSymbolApi { this: MethodSymbol => def t: Int }
+}
+
+/** @contentDiagram hideNodes "*Api" */
+trait Y extends X
diff --git a/test/scaladoc/run/SI-6511.check b/test/scaladoc/run/SI-6511.check
new file mode 100644
index 0000000000..3925a0d464
--- /dev/null
+++ b/test/scaladoc/run/SI-6511.check
@@ -0,0 +1 @@
+Done.
+\ No newline at end of file
diff --git a/test/scaladoc/run/SI-6511.scala b/test/scaladoc/run/SI-6511.scala
new file mode 100644
index 0000000000..cc950a98d6
--- /dev/null
+++ b/test/scaladoc/run/SI-6511.scala
@@ -0,0 +1,22 @@
+import scala.tools.nsc.doc.model._
+import scala.tools.partest.ScaladocModelTest
+
+object Test extends ScaladocModelTest {
+
+  override def resourceFile: String = "SI-6511.scala"
+
+  // no need for special settings
+  def scaladocSettings = "-diagrams"
+
+  def testModel(rootPackage: Package) = {
+    // get the quick access implicit defs in scope (_package(s), _class(es), _trait(s), object(s) _method(s), _value(s))
+    import access._
+
+    val main = rootPackage._package("test")._package("scaladoc")._package("template")._package("diagrams")
+    val X = main._trait("X")
+    val Y = main._trait("Y")
+
+    testDiagram(X, X.contentDiagram, nodes = 4, edges = 3)
+    testDiagram(Y, Y.contentDiagram, nodes = 4, edges = 3)
+  }
+}
+\ No newline at end of file