Fixed various issues with -Ywarn-dead-code.

enjoy fewer spurious warnings. Closes #1681, no review.

3 files changed, 42 insertions, 0 deletions

diff --git a/test/files/neg/check-dead.check b/test/files/neg/check-dead.check
new file mode 100644
index 0000000000..be4de3060b
--- /dev/null
+++ b/test/files/neg/check-dead.check
@@ -0,0 +1,7 @@
+check-dead.scala:27: error: dead code following this construct
+    throw new Exception
+    ^
+check-dead.scala:31: error: dead code following this construct
+    throw new Exception
+    ^
+two errors found
diff --git a/test/files/neg/check-dead.flags b/test/files/neg/check-dead.flags
new file mode 100644
index 0000000000..c7d406c649
--- /dev/null
+++ b/test/files/neg/check-dead.flags
@@ -0,0 +1 @@
+-Ywarn-dead-code -Xfatal-warnings
\ No newline at end of file
diff --git a/test/files/neg/check-dead.scala b/test/files/neg/check-dead.scala
new file mode 100644
index 0000000000..851e81d886
--- /dev/null
+++ b/test/files/neg/check-dead.scala
@@ -0,0 +1,34 @@
+package dummy
+
+object Error {
+    def soSorry(msg: String = "sorry"): Nothing =
+        throw new Exception("we have a problem: "+msg)
+}
+
+class NoDeads {
+    def x = synchronized { throw new Exception }
+    def y[T](arg: T) = println("foo")
+    def z = this.y(throw new Exception)
+
+    def dummy1: Int = synchronized {
+        val i = 10 + 2
+        return i
+    }
+    def dummy1b: Int = synchronized {
+        val i = 10 + 2
+        i
+    }
+
+    def dummy2: String = Error.soSorry("we're dummies")
+}
+
+class Deads {
+  def x1 = synchronized {
+    throw new Exception
+    5 * 5
+  }
+  def x2: Int = synchronized {
+    throw new Exception
+    return 5
+  }
+}
\ No newline at end of file