Improved warning for insensible comparisons.

Utilize knowledge of case class synthetic equals to rule out
some comparisons statically.  Closes SI-5426.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/files/neg/t5426.scala b/test/files/neg/t5426.scala
new file mode 100644
index 0000000000..f2fb5cc12c
--- /dev/null
+++ b/test/files/neg/t5426.scala
@@ -0,0 +1,10 @@
+class A {
+  def f1 = Some(5) == 5
+  def f2 = 5 == Some(5)
+  
+  val x1 = 5
+  val x2 = Some(5)
+  
+  (x1 == x2)
+  (x2 == x1)
+}