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-rw-r--r--test/files/pos/MailBox.scala2
-rw-r--r--test/files/pos/alladin763.scala37
-rw-r--r--test/files/pos/functions.scala4
-rw-r--r--test/files/pos/inline-access-levels.flags2
-rw-r--r--test/files/pos/inliner2.flags1
-rw-r--r--test/files/pos/inliner2.scala57
-rw-r--r--test/files/pos/list-optim-check.flags1
-rw-r--r--test/files/pos/list-optim-check.scala21
-rw-r--r--test/files/pos/native-warning.scala4
-rw-r--r--test/files/pos/sealed-final.flags1
-rw-r--r--test/files/pos/sealed-final.scala14
-rw-r--r--test/files/pos/t3234.flags1
-rw-r--r--test/files/pos/t3234.scala17
-rw-r--r--test/files/pos/t3420.flags2
-rw-r--r--test/files/pos/t533.scala11
-rw-r--r--test/files/pos/t5899.scala1
-rw-r--r--test/files/pos/t6778.scala5
-rw-r--r--test/files/pos/t7784.scala13
-rw-r--r--test/files/pos/t8410.flags2
-rw-r--r--test/files/pos/t8462.scala11
-rw-r--r--test/files/pos/t8862a.scala47
-rw-r--r--test/files/pos/t8862b.scala12
-rw-r--r--test/files/pos/t9074.scala24
-rw-r--r--test/files/pos/t9074b.scala15
-rw-r--r--test/files/pos/t9131.scala12
-rw-r--r--test/files/pos/t9178.flags1
-rw-r--r--test/files/pos/t9178.scala13
-rw-r--r--test/files/pos/t9178b.flags1
-rw-r--r--test/files/pos/t9178b.scala7
-rw-r--r--test/files/pos/t9326a.scala6
-rw-r--r--test/files/pos/t9399.flags1
-rw-r--r--test/files/pos/t9399.scala17
-rw-r--r--test/files/pos/t9411a.flags1
-rw-r--r--test/files/pos/t9411a.scala27
-rw-r--r--test/files/pos/t9411b.flags1
-rw-r--r--test/files/pos/t9411b.scala36
-rw-r--r--test/files/pos/t9479.scala15
-rw-r--r--test/files/pos/t9479b.scala15
-rw-r--r--test/files/pos/t9498.scala25
-rw-r--r--test/files/pos/t9630.flags1
-rw-r--r--test/files/pos/t9630/t9630a.scala9
-rw-r--r--test/files/pos/t9630/t9630b.scala8
42 files changed, 390 insertions, 111 deletions
diff --git a/test/files/pos/MailBox.scala b/test/files/pos/MailBox.scala
index 8e27bd362d..6bb25adb19 100644
--- a/test/files/pos/MailBox.scala
+++ b/test/files/pos/MailBox.scala
@@ -1,6 +1,6 @@
package test;
-import scala.actors.TIMEOUT;
+object TIMEOUT
class MailBox {
diff --git a/test/files/pos/alladin763.scala b/test/files/pos/alladin763.scala
new file mode 100644
index 0000000000..29c9b25318
--- /dev/null
+++ b/test/files/pos/alladin763.scala
@@ -0,0 +1,37 @@
+// Test from http://lrytz.github.io/scala-aladdin-bugtracker/displayItem.do%3Fid=763.html
+// and expanded with package object variants
+
+
+trait Foo { type T; def apply() : T }
+object e extends Foo { type T = Int; def apply() = 42 }
+
+package p {
+ trait T[X] { def O : { def apply(): X } }
+ object `package` extends T[Int] {
+ def O: { def apply(): Int } = new { def apply(): Int = 42 }
+ }
+
+ object Test {
+ val x: Int = O()
+ }
+}
+
+object Test {
+
+ val f = new Foo { type T = Int; def apply() = 42 }
+
+ def main(args: Array[String]): Unit = {
+ val g = new Foo { type T = Int; def apply() = 42 }
+
+ (e: Foo)()
+ val ee: Int = e()
+
+ (f: Foo)()
+ val ff: Int = f()
+
+ (g: Foo)()
+ val gg: Int = g()
+
+ val pp: Int = p.O()
+ }
+}
diff --git a/test/files/pos/functions.scala b/test/files/pos/functions.scala
index 0207523dde..25d1c46eac 100644
--- a/test/files/pos/functions.scala
+++ b/test/files/pos/functions.scala
@@ -1,4 +1,6 @@
-import scala.actors.Actor
+object Actor {
+ def receive[A](f: PartialFunction[Any, A]): A = ???
+}
object Test {
diff --git a/test/files/pos/inline-access-levels.flags b/test/files/pos/inline-access-levels.flags
index 882f40f050..d34387c651 100644
--- a/test/files/pos/inline-access-levels.flags
+++ b/test/files/pos/inline-access-levels.flags
@@ -1 +1 @@
--optimise -Xfatal-warnings -Yinline-warnings
+-Yopt:l:classpath -Xfatal-warnings -Yinline-warnings
diff --git a/test/files/pos/inliner2.flags b/test/files/pos/inliner2.flags
deleted file mode 100644
index ea03113c66..0000000000
--- a/test/files/pos/inliner2.flags
+++ /dev/null
@@ -1 +0,0 @@
--optimise -Xfatal-warnings \ No newline at end of file
diff --git a/test/files/pos/inliner2.scala b/test/files/pos/inliner2.scala
deleted file mode 100644
index bc83e04312..0000000000
--- a/test/files/pos/inliner2.scala
+++ /dev/null
@@ -1,57 +0,0 @@
-// This isn't actually testing much, because no warning is emitted in versions
-// before the fix which comes with this because the method isn't even considered
-// for inlining due to the bug.
-class A {
- private var debug = false
- @inline private def ifelse[T](cond: => Boolean, ifPart: => T, elsePart: => T): T =
- if (cond) ifPart else elsePart
-
- final def bob1() = ifelse(debug, 1, 2)
- final def bob2() = if (debug) 1 else 2
-}
-// Cool:
-//
-// % ls -1 /tmp/2901/
-// A$$anonfun$bob1$1.class
-// A$$anonfun$bob1$2.class
-// A$$anonfun$bob1$3.class
-// A.class
-// % ls -1 /tmp/trunk
-// A.class
-//
-// Observations:
-//
-// (1) The inlined version accesses the field: the explicit one calls the accessor.
-// (2) The inlined version fails to eliminate boxing. With reference types it emits
-// an unneeded checkcast.
-// (3) The private var debug is mangled to A$$debug, but after inlining it is never accessed
-// from outside of the class and doesn't need mangling.
-// (4) We could forego emitting bytecode for ifelse entirely if it has been
-// inlined at all sites.
-//
-// Generated bytecode for the above:
-//
-// public final int bob1();
-// Code:
-// Stack=1, Locals=1, Args_size=1
-// 0: aload_0
-// 1: getfield #11; //Field A$$debug:Z
-// 4: ifeq 14
-// 7: iconst_1
-// 8: invokestatic #41; //Method scala/runtime/BoxesRunTime.boxToInteger:(I)Ljava/lang/Integer;
-// 11: goto 18
-// 14: iconst_2
-// 15: invokestatic #41; //Method scala/runtime/BoxesRunTime.boxToInteger:(I)Ljava/lang/Integer;
-// 18: invokestatic #45; //Method scala/runtime/BoxesRunTime.unboxToInt:(Ljava/lang/Object;)I
-// 21: ireturn
-//
-// public final int bob2();
-// Code:
-// Stack=1, Locals=1, Args_size=1
-// 0: aload_0
-// 1: invokevirtual #48; //Method A$$debug:()Z
-// 4: ifeq 11
-// 7: iconst_1
-// 8: goto 12
-// 11: iconst_2
-// 12: ireturn
diff --git a/test/files/pos/list-optim-check.flags b/test/files/pos/list-optim-check.flags
deleted file mode 100644
index 49d036a887..0000000000
--- a/test/files/pos/list-optim-check.flags
+++ /dev/null
@@ -1 +0,0 @@
--optimize
diff --git a/test/files/pos/list-optim-check.scala b/test/files/pos/list-optim-check.scala
deleted file mode 100644
index f6e6ddec77..0000000000
--- a/test/files/pos/list-optim-check.scala
+++ /dev/null
@@ -1,21 +0,0 @@
-// Tests a map known to crash in optimizer with faster List map in SI-8240.
-// Equivalent tests for collect and flatmap do not crash, but are provided
-// anyway.
-// See ticket SI-8334 for optimizer bug.
-// TODO - Remove this test once SI-8334 is fixed and has its own test.
-class A {
- def f: Boolean = {
- val xs = Nil map (_ => return false)
- true
- }
-
- def g: Boolean = {
- val xs = Nil collect { case _ => return false }
- true
- }
-
- def h: Boolean = {
- val xs = Nil flatMap { _ => return false }
- true
- }
-}
diff --git a/test/files/pos/native-warning.scala b/test/files/pos/native-warning.scala
index f721a57e8f..a2918c11b5 100644
--- a/test/files/pos/native-warning.scala
+++ b/test/files/pos/native-warning.scala
@@ -1,3 +1,7 @@
class A {
@native def setup(): Unit
+
+ // also kosher
+ @native private def f(): Unit
+ @native final def g(): Unit
}
diff --git a/test/files/pos/sealed-final.flags b/test/files/pos/sealed-final.flags
deleted file mode 100644
index cfabf7a5b4..0000000000
--- a/test/files/pos/sealed-final.flags
+++ /dev/null
@@ -1 +0,0 @@
--Xfatal-warnings -Yinline-warnings -optimise \ No newline at end of file
diff --git a/test/files/pos/sealed-final.scala b/test/files/pos/sealed-final.scala
deleted file mode 100644
index bdedb5c1f6..0000000000
--- a/test/files/pos/sealed-final.scala
+++ /dev/null
@@ -1,14 +0,0 @@
-sealed abstract class Foo {
- @inline def bar(x: Int) = x + 1
-}
-object Foo {
- def mkFoo(): Foo = new Baz2
-}
-
-object Baz1 extends Foo
-final class Baz2 extends Foo
-
-object Test {
- // bar should be inlined now
- def f = Foo.mkFoo() bar 10
-}
diff --git a/test/files/pos/t3234.flags b/test/files/pos/t3234.flags
new file mode 100644
index 0000000000..78726f64f7
--- /dev/null
+++ b/test/files/pos/t3234.flags
@@ -0,0 +1 @@
+-Yopt:l:project -Yinline-warnings -Xfatal-warnings
diff --git a/test/files/pos/t3234.scala b/test/files/pos/t3234.scala
new file mode 100644
index 0000000000..c3b7366db8
--- /dev/null
+++ b/test/files/pos/t3234.scala
@@ -0,0 +1,17 @@
+trait Trait1 {
+ @inline def foo2(n: Int) = n*n
+}
+
+trait Trait2 {
+ @inline def foo3(n: Int) = 1
+}
+
+class Base extends Trait1 {
+ @inline def foo(n: Int) = n
+}
+
+object Test extends Base with Trait2 {
+ def main(args: Array[String]) = {
+ println(foo(42) + foo2(11) + foo3(2))
+ }
+} \ No newline at end of file
diff --git a/test/files/pos/t3420.flags b/test/files/pos/t3420.flags
index ea03113c66..4fbafb7e80 100644
--- a/test/files/pos/t3420.flags
+++ b/test/files/pos/t3420.flags
@@ -1 +1 @@
--optimise -Xfatal-warnings \ No newline at end of file
+-Yopt-warnings Yopt:l:project -Xfatal-warnings \ No newline at end of file
diff --git a/test/files/pos/t533.scala b/test/files/pos/t533.scala
deleted file mode 100644
index 0a6515fed3..0000000000
--- a/test/files/pos/t533.scala
+++ /dev/null
@@ -1,11 +0,0 @@
-import scala.actors._
-
-object test extends Actor {
- def act() {
- receive {
- case TIMEOUT => Console.println("TIMEOUT")
- //case _ => Console.println("_")
- }
- }
-}
-
diff --git a/test/files/pos/t5899.scala b/test/files/pos/t5899.scala
index b16f1f84fe..885baca790 100644
--- a/test/files/pos/t5899.scala
+++ b/test/files/pos/t5899.scala
@@ -14,6 +14,7 @@ trait Foo {
Bippy(Stable) match {
case Bippy(nme.WILDCARD) => 1
case Bippy(Stable) => 2 // should not be considered unreachable
+ case Bippy(_) => 3
}
}
} \ No newline at end of file
diff --git a/test/files/pos/t6778.scala b/test/files/pos/t6778.scala
new file mode 100644
index 0000000000..b7483c8fce
--- /dev/null
+++ b/test/files/pos/t6778.scala
@@ -0,0 +1,5 @@
+object test extends AnyRef with App {
+ // Check that random can be called with parenthesis.
+ scala.math.random()
+}
+
diff --git a/test/files/pos/t7784.scala b/test/files/pos/t7784.scala
new file mode 100644
index 0000000000..e6824a4203
--- /dev/null
+++ b/test/files/pos/t7784.scala
@@ -0,0 +1,13 @@
+object Test {
+ final val a = ""
+ var b: a.type = a
+ b = a
+
+ final val x = classOf[Object]
+ var y: x.type = x
+ y = x
+
+ final val e = Thread.State.NEW
+ var e1: e.type = e
+ e1 = e
+}
diff --git a/test/files/pos/t8410.flags b/test/files/pos/t8410.flags
index dcd5943c2f..01fc9cd3ac 100644
--- a/test/files/pos/t8410.flags
+++ b/test/files/pos/t8410.flags
@@ -1 +1 @@
--optimise -Xfatal-warnings -deprecation:false -Yinline-warnings:false
+-Yopt:l:project -Xfatal-warnings -deprecation:false -Yinline-warnings:false
diff --git a/test/files/pos/t8462.scala b/test/files/pos/t8462.scala
new file mode 100644
index 0000000000..6946cf8e5e
--- /dev/null
+++ b/test/files/pos/t8462.scala
@@ -0,0 +1,11 @@
+
+trait ConstantOps {
+ def exprs = (
+ 1 << 2L : Int, // was: error: type mismatch; found : Long(4L)
+ 64 >> 2L : Int, // was: error: type mismatch; found : Long(4L)
+ 64 >>> 2L : Int, // was: error: type mismatch; found : Long(4L)
+ 'a' << 2L : Int,
+ 'a' >> 2L : Int,
+ 'a'>>> 2L : Int
+ )
+}
diff --git a/test/files/pos/t8862a.scala b/test/files/pos/t8862a.scala
new file mode 100644
index 0000000000..f9576707ba
--- /dev/null
+++ b/test/files/pos/t8862a.scala
@@ -0,0 +1,47 @@
+package p {
+
+ abstract class C[A] {
+ def x: A
+ implicit def oops: A = x
+ implicit def oopso: Option[A] = None
+ }
+
+ package q {
+
+ class Oops
+
+ object `package` extends C[Oops] {
+ override def x = new Oops
+ }
+
+ object Blah {
+ oops
+ oopso
+
+ // implicits found in enclosing context
+ implicitly[Oops]
+ implicitly[Option[Oops]]
+ }
+ }
+}
+
+package other {
+
+ object Blah {
+ // implicits found through this import
+ import p.q._
+
+ oops
+ oopso
+
+ implicitly[Oops]
+ implicitly[Option[Oops]]
+ }
+
+
+ object Blee {
+ // implicits found through the companion implicits
+ implicitly[p.q.Oops]
+ implicitly[Option[p.q.Oops]]
+ }
+}
diff --git a/test/files/pos/t8862b.scala b/test/files/pos/t8862b.scala
new file mode 100644
index 0000000000..8be7fb5fab
--- /dev/null
+++ b/test/files/pos/t8862b.scala
@@ -0,0 +1,12 @@
+package p {
+ trait T[X] { def O : { def apply(): X } }
+ object `package` extends T[Int] {
+ def O: { def apply(): Int } = new { def apply(): Int = 42 }
+ }
+
+ object Test {
+ def main(args: Array[String]): Unit = {
+ val x: Int = O()
+ }
+ }
+}
diff --git a/test/files/pos/t9074.scala b/test/files/pos/t9074.scala
new file mode 100644
index 0000000000..67db281f54
--- /dev/null
+++ b/test/files/pos/t9074.scala
@@ -0,0 +1,24 @@
+package blam {
+
+ package foo {
+
+ trait F[T] {
+ def f(d: Double, t: T): T = ???
+ def f(d: Int, t: T): T = ???
+ def f(d: String, t: T): T = ???
+
+ def g[A](a: T): T = ???
+ def g(a: Int) = ???
+ }
+ }
+
+ package object foo extends foo.F[Double] {
+ override def f(d: Double, t: Double): Double = ???
+ }
+}
+
+object Test {
+ import blam._
+ foo.f("3", 4.0)
+ foo.g[Any](1d) : Double
+}
diff --git a/test/files/pos/t9074b.scala b/test/files/pos/t9074b.scala
new file mode 100644
index 0000000000..dadcebf399
--- /dev/null
+++ b/test/files/pos/t9074b.scala
@@ -0,0 +1,15 @@
+trait Echo [T] {
+ def echo(t: T): Unit
+}
+
+trait IntEcho extends Echo[Int] {
+ def echo(t: Int) = println(t)
+}
+
+object echo extends IntEcho
+package object echo1 extends IntEcho
+
+object App extends App {
+ echo.echo(1)
+ echo1.echo(1)
+}
diff --git a/test/files/pos/t9131.scala b/test/files/pos/t9131.scala
new file mode 100644
index 0000000000..1a186a0a24
--- /dev/null
+++ b/test/files/pos/t9131.scala
@@ -0,0 +1,12 @@
+class Test {
+
+ def byNameFunc(f: (=> (() => Any)) => Any): Unit = ()
+
+ def test = {
+ // "value apply is not a member of => () => Any"
+ byNameFunc(z => z())
+ // okay
+ byNameFunc(z => z.apply())
+ byNameFunc(z => {val f = z; f()})
+ }
+}
diff --git a/test/files/pos/t9178.flags b/test/files/pos/t9178.flags
new file mode 100644
index 0000000000..7de3c0f3ee
--- /dev/null
+++ b/test/files/pos/t9178.flags
@@ -0,0 +1 @@
+-Xfatal-warnings -deprecation
diff --git a/test/files/pos/t9178.scala b/test/files/pos/t9178.scala
new file mode 100644
index 0000000000..f2cf20a778
--- /dev/null
+++ b/test/files/pos/t9178.scala
@@ -0,0 +1,13 @@
+// eta expansion to Function0 is problematic (as shown here).
+// Perhaps we should we deprecate it? See discussion in the comments of
+// on SI-9178.
+//
+// This test encodes the status quo: no deprecation.
+object Test {
+ def foo(): () => String = () => ""
+ val f: () => Any = foo
+
+ def main(args: Array[String]): Unit = {
+ println(f()) // <function0>
+ }
+}
diff --git a/test/files/pos/t9178b.flags b/test/files/pos/t9178b.flags
new file mode 100644
index 0000000000..48fd867160
--- /dev/null
+++ b/test/files/pos/t9178b.flags
@@ -0,0 +1 @@
+-Xexperimental
diff --git a/test/files/pos/t9178b.scala b/test/files/pos/t9178b.scala
new file mode 100644
index 0000000000..cbeaed4f17
--- /dev/null
+++ b/test/files/pos/t9178b.scala
@@ -0,0 +1,7 @@
+abstract class Test{
+ val writeInput: java.io.OutputStream => Unit
+ def getOutputStream(): java.io.OutputStream
+
+ writeInput(getOutputStream)
+}
+
diff --git a/test/files/pos/t9326a.scala b/test/files/pos/t9326a.scala
new file mode 100644
index 0000000000..aefc735585
--- /dev/null
+++ b/test/files/pos/t9326a.scala
@@ -0,0 +1,6 @@
+package p
+
+trait M[A]
+
+class C extends M[Tuple1[X] forSome { type X }]
+
diff --git a/test/files/pos/t9399.flags b/test/files/pos/t9399.flags
new file mode 100644
index 0000000000..85d8eb2ba2
--- /dev/null
+++ b/test/files/pos/t9399.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
diff --git a/test/files/pos/t9399.scala b/test/files/pos/t9399.scala
new file mode 100644
index 0000000000..e8a8720f94
--- /dev/null
+++ b/test/files/pos/t9399.scala
@@ -0,0 +1,17 @@
+sealed abstract class TA
+sealed abstract class TB extends TA
+case object A extends TA
+case object B extends TB
+
+sealed trait C
+case class CTA(id: Int, da: TA) extends C
+case class CTB(id: Int, da: TB) extends C
+
+class Test {
+ def test(c: C): Unit = c match {
+ case CTA(_, A) =>
+ case CTA(_, B) =>
+ case CTB(_, B) =>
+ }
+}
+
diff --git a/test/files/pos/t9411a.flags b/test/files/pos/t9411a.flags
new file mode 100644
index 0000000000..85d8eb2ba2
--- /dev/null
+++ b/test/files/pos/t9411a.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
diff --git a/test/files/pos/t9411a.scala b/test/files/pos/t9411a.scala
new file mode 100644
index 0000000000..d5264663ec
--- /dev/null
+++ b/test/files/pos/t9411a.scala
@@ -0,0 +1,27 @@
+object OhNoes {
+
+ sealed trait F
+ sealed abstract class FA extends F
+ sealed abstract class FB extends F
+
+ case object FA1 extends FA
+ case object FB1 extends FB
+ case object FB2 extends FB
+
+ sealed trait G
+ case object G1 extends G
+ case object G2 extends G
+
+ sealed trait H
+ case class H1(a: FB, b: G) extends H
+ case class H2(a: F) extends H
+
+ val demo: H => Unit = {
+ case H1(FB1, G1) =>
+ case H1(FB2, G2) =>
+ case H2(_: FB) =>
+ case H2(_: FA) =>
+ case H1(FB1, G2) =>
+ case H1(FB2, G1) =>
+ }
+}
diff --git a/test/files/pos/t9411b.flags b/test/files/pos/t9411b.flags
new file mode 100644
index 0000000000..85d8eb2ba2
--- /dev/null
+++ b/test/files/pos/t9411b.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
diff --git a/test/files/pos/t9411b.scala b/test/files/pos/t9411b.scala
new file mode 100644
index 0000000000..6888ba9382
--- /dev/null
+++ b/test/files/pos/t9411b.scala
@@ -0,0 +1,36 @@
+object OhNoes {
+
+ sealed trait F
+ sealed abstract class FA extends F
+ sealed abstract class FB extends F
+
+ case object FA1 extends FA
+ case object FB1 extends FB
+ case object FB2 extends FB
+
+ sealed trait G
+ case object G1 extends G
+ case object G2 extends G
+
+ sealed trait H
+ case class H1(a: FB, b: G) extends H
+ case class H2(b: F) extends H
+
+ val demo: H => Unit = {
+ case H1(FB1, G1) =>
+ case H1(FB2, G2) =>
+ case H2(_: FB) =>
+ case H2(_: FA) =>
+ case H1(FB1, G2) =>
+ case H1(FB2, G1) =>
+ }
+
+ val demo2: H => Unit = {
+ case H2(_: FA) =>
+ case H2(_: FB) =>
+ case H1(FB1, G1) =>
+ case H1(FB2, G1) =>
+ case H1(FB1, G2) =>
+ case H1(FB2, G2) =>
+ }
+}
diff --git a/test/files/pos/t9479.scala b/test/files/pos/t9479.scala
new file mode 100644
index 0000000000..38eabf4338
--- /dev/null
+++ b/test/files/pos/t9479.scala
@@ -0,0 +1,15 @@
+trait Predefs {
+ def bridge(p: String): Unit = ???
+ def bridge(p: Any): Unit = ???
+}
+
+package object molecule extends Predefs
+
+package molecule {
+ package process {
+ class Test {
+ def main(): Unit = bridge(null, null)
+ }
+ }
+}
+
diff --git a/test/files/pos/t9479b.scala b/test/files/pos/t9479b.scala
new file mode 100644
index 0000000000..5fc795a1fd
--- /dev/null
+++ b/test/files/pos/t9479b.scala
@@ -0,0 +1,15 @@
+trait Predefs {
+ def bridge(p: String): Unit = ???
+ def bridge(p: Any): Unit = ???
+}
+
+package object molecule extends Predefs
+
+package molecule {
+ package process {
+ class Test {
+ def main(): Unit = molecule.bridge(null, null)
+ }
+ }
+}
+
diff --git a/test/files/pos/t9498.scala b/test/files/pos/t9498.scala
new file mode 100644
index 0000000000..32fc01a806
--- /dev/null
+++ b/test/files/pos/t9498.scala
@@ -0,0 +1,25 @@
+trait Inv[A] { def head: A }
+trait Cov[+A] { def head: A }
+
+class Test {
+ def inv(i: Inv[Inv[String]]) = i match {
+ case l: Inv[a] =>
+ val x: a = l.head
+ x.head: String // okay
+ }
+
+ def cov(c: Cov[Cov[String]]) = c match {
+ case l: Cov[a] =>
+ val x: a = l.head
+ x.head: String // was: found A, required String
+ }
+
+ def cov1(c: Cov[Cov[String]]) = c match {
+ case l: Cov[a] => l.head.head
+ }
+ cov1(null): String // was: found A, required String
+
+ def cov3(c: Cov[Cov[String]]): String = c match {
+ case l: Cov[a] => val l1: l.type = l; l1.head.head
+ }
+}
diff --git a/test/files/pos/t9630.flags b/test/files/pos/t9630.flags
new file mode 100644
index 0000000000..85d8eb2ba2
--- /dev/null
+++ b/test/files/pos/t9630.flags
@@ -0,0 +1 @@
+-Xfatal-warnings
diff --git a/test/files/pos/t9630/t9630a.scala b/test/files/pos/t9630/t9630a.scala
new file mode 100644
index 0000000000..c76ecd2ff2
--- /dev/null
+++ b/test/files/pos/t9630/t9630a.scala
@@ -0,0 +1,9 @@
+
+sealed trait Base
+final case class Base_1(sameName: Some[Any]) extends Base
+final case class Base_2(sameName: Nested) extends Base
+
+sealed trait Nested
+final case class Nested_1(x: Any) extends Nested
+final case class Nested_2(y: Any) extends Nested
+
diff --git a/test/files/pos/t9630/t9630b.scala b/test/files/pos/t9630/t9630b.scala
new file mode 100644
index 0000000000..3e1787ec52
--- /dev/null
+++ b/test/files/pos/t9630/t9630b.scala
@@ -0,0 +1,8 @@
+
+class Test {
+ def test(b: Base): Unit = b match {
+ case Base_1(Some(_)) =>
+ case Base_2(Nested_1(_)) =>
+ case Base_2(Nested_2(_)) =>
+ }
+}