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authorPaul Phillips <paulp@improving.org>2013-10-01 20:28:48 -0700
committerPaul Phillips <paulp@improving.org>2013-10-01 20:41:41 -0700
commit5708e9d73ba01c286d7155606b72caeab914face (patch)
tree422ca2158adb3392aa3826ea9ab9cae4a379f5ce /test/files/neg/gadts2.scala
parent95d5554b9a263e3eb060c181463234f3e79864ab (diff)
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SI-6680 unsoundness in gadt typing.
Introduces -Xstrict-inference to deal with the significant gap between soundness and what presently compiles. I'm hopeful that it's TOO strict, because it finds e.g. 75 errors compiling immutable/IntMap.scala, but it might be that bad.
Diffstat (limited to 'test/files/neg/gadts2.scala')
-rw-r--r--test/files/neg/gadts2.scala12
1 files changed, 12 insertions, 0 deletions
diff --git a/test/files/neg/gadts2.scala b/test/files/neg/gadts2.scala
new file mode 100644
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+++ b/test/files/neg/gadts2.scala
@@ -0,0 +1,12 @@
+trait Super[+A]
+case class Sub[B](f: B => B) extends Super[B]
+
+object Test extends App {
+ val s1 = Sub((x: Int) => x)
+
+ (s1: Super[Any]) match { case Sub(f) => f("abc") }
+}
+// java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer
+// at scala.runtime.BoxesRunTime.unboxToInt(BoxesRunTime.java:105)
+// at Test$$anonfun$1.apply(a.scala:5)
+// at Test$.delayedEndpoint$Test$1(a.scala:7)