3 files changed, 20 insertions, 0 deletions
diff --git a/test/files/neg/t9953.check b/test/files/neg/t9953.check
new file mode 100644
index 0000000000..f5dcbcacee
--- /dev/null
+++ b/test/files/neg/t9953.check
@@ -0,0 +1,6 @@
+t9953.scala:10: warning: Object and X are unrelated: they will never compare equal
+  def b = y == x   // warn
+            ^
+error: No warnings can be incurred under -Xfatal-warnings.
+one warning found
+one error found
diff --git a/test/files/neg/t9953.flags b/test/files/neg/t9953.flags
new file mode 100644
index 0000000000..85d8eb2ba2
--- /dev/null
+++ b/test/files/neg/t9953.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
diff --git a/test/files/neg/t9953.scala b/test/files/neg/t9953.scala
new file mode 100644
index 0000000000..faaee86d50
--- /dev/null
+++ b/test/files/neg/t9953.scala
@@ -0,0 +1,13 @@
+
+class X(val v: Int) extends AnyVal
+trait T extends Any
+object Y extends T
+
+class C {
+  val x = new X(42)
+  val y = new Object
+  val a: T = null
+  def b = y == x   // warn
+  def c = y == a   // no warn
+  def d = Y == a   // no warn
+}