3 files changed, 21 insertions, 0 deletions
diff --git a/test/files/neg/t7290.check b/test/files/neg/t7290.check
new file mode 100644
index 0000000000..85bedbac95
--- /dev/null
+++ b/test/files/neg/t7290.check
@@ -0,0 +1,10 @@
+t7290.scala:4: error: Pattern contains duplicate alternatives: 0
+    case 0 | 0 => 0
+         ^
+t7290.scala:5: error: Pattern contains duplicate alternatives: 2, 3
+    case 2 | 2 | 2 | 3 | 2 | 3 => 0
+         ^
+t7290.scala:6: error: Pattern contains duplicate alternatives: 4
+    case 4 | (_ @ 4) => 0
+         ^
+three errors found
diff --git a/test/files/neg/t7290.flags b/test/files/neg/t7290.flags
new file mode 100644
index 0000000000..e8fb65d50c
--- /dev/null
+++ b/test/files/neg/t7290.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
+\ No newline at end of file
diff --git a/test/files/neg/t7290.scala b/test/files/neg/t7290.scala
new file mode 100644
index 0000000000..b9db7f7e8a
--- /dev/null
+++ b/test/files/neg/t7290.scala
@@ -0,0 +1,10 @@
+object Test extends App {
+  val y = (0: Int) match {
+    case 1 => 1
+    case 0 | 0 => 0
+    case 2 | 2 | 2 | 3 | 2 | 3 => 0
+    case 4 | (_ @ 4) => 0
+    case _ => -1
+  }
+  assert(y == 0, y)
+}