SI-6210 Test case for already-fixed pattern matcher bug

The fix arrived in SI-6022 / #1100 / 2.10.0-M7.

2 files changed, 22 insertions, 0 deletions

diff --git a/test/files/pos/t6210.flags b/test/files/pos/t6210.flags
new file mode 100644
index 0000000000..e8fb65d50c
--- /dev/null
+++ b/test/files/pos/t6210.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
\ No newline at end of file
diff --git a/test/files/pos/t6210.scala b/test/files/pos/t6210.scala
new file mode 100644
index 0000000000..1ce8493872
--- /dev/null
+++ b/test/files/pos/t6210.scala
@@ -0,0 +1,21 @@
+abstract sealed trait AST
+abstract sealed trait AExpr                  extends AST
+case class AAssign(name: String, v: AExpr)   extends AExpr
+case class AConstBool(v: Boolean)            extends AExpr
+
+trait Ty {}
+case class TInt() extends Ty
+case class TBool() extends Ty
+
+object Foo {
+  def checkExpr(ast: AExpr): Ty = {
+    var astTy:Ty = ast match {
+      case AAssign(nm: String, v:AExpr) => TBool() 
+
+      case AConstBool(v: Boolean) => TBool() 
+
+      case _                          => throw new Exception(s"Unhandled case check(ast: ${ast.getClass})")
+    }
+    astTy
+  }
+}