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-rw-r--r--src/compiler/scala/tools/nsc/typechecker/PatternMatching.scala2
-rw-r--r--test/files/pos/t5968.flags1
-rw-r--r--test/files/pos/t5968.scala8
3 files changed, 11 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/PatternMatching.scala b/src/compiler/scala/tools/nsc/typechecker/PatternMatching.scala
index 9b8ddffb49..f99d0e733b 100644
--- a/src/compiler/scala/tools/nsc/typechecker/PatternMatching.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/PatternMatching.scala
@@ -2362,6 +2362,8 @@ trait PatternMatching extends Transform with TypingTransformers with ast.TreeDSL
// patmatDebug("enum bool "+ tp)
Some(List(ConstantType(Constant(true)), ConstantType(Constant(false))))
// TODO case _ if tp.isTupleType => // recurse into component types
+ case modSym: ModuleClassSymbol =>
+ Some(List(tp))
case sym if !sym.isSealed || isPrimitiveValueClass(sym) =>
// patmatDebug("enum unsealed "+ (tp, sym, sym.isSealed, isPrimitiveValueClass(sym)))
None
diff --git a/test/files/pos/t5968.flags b/test/files/pos/t5968.flags
new file mode 100644
index 0000000000..e8fb65d50c
--- /dev/null
+++ b/test/files/pos/t5968.flags
@@ -0,0 +1 @@
+-Xfatal-warnings \ No newline at end of file
diff --git a/test/files/pos/t5968.scala b/test/files/pos/t5968.scala
new file mode 100644
index 0000000000..0093f84fc0
--- /dev/null
+++ b/test/files/pos/t5968.scala
@@ -0,0 +1,8 @@
+object X {
+ def f(e: Either[Int, X.type]) = e match {
+ case Left(i) => i
+ case Right(X) => 0
+ // SI-5986 spurious exhaustivity warning here
+ }
+}
+