Made -Xfatal-warnings less immediately fatal.

Instead of changing warnings to errors mid-stream, at the end of
a run I check for condition "no errors, some warnings, and fatal
warnings" and then generate an error at that point.  This is
necessary to test for some warnings which come from later stages.

1 files changed, 7 insertions, 5 deletions

diff --git a/test/files/neg/t5426.check b/test/files/neg/t5426.check
index d9e192d3f0..98f3ddaaae 100644
--- a/test/files/neg/t5426.check
+++ b/test/files/neg/t5426.check
@@ -1,13 +1,15 @@
-t5426.scala:2: error: comparing values of types Some[Int] and Int using `==' will always yield false
+t5426.scala:2: warning: comparing values of types Some[Int] and Int using `==' will always yield false
   def f1 = Some(5) == 5
                    ^
-t5426.scala:3: error: comparing values of types Int and Some[Int] using `==' will always yield false
+t5426.scala:3: warning: comparing values of types Int and Some[Int] using `==' will always yield false
   def f2 = 5 == Some(5)
              ^
-t5426.scala:8: error: comparing values of types Int and Some[Int] using `==' will always yield false
+t5426.scala:8: warning: comparing values of types Int and Some[Int] using `==' will always yield false
   (x1 == x2)
       ^
-t5426.scala:9: error: comparing values of types Some[Int] and Int using `==' will always yield false
+t5426.scala:9: warning: comparing values of types Some[Int] and Int using `==' will always yield false
   (x2 == x1)
       ^
-four errors found
+error: No warnings can be incurred under -Xfatal-warnings.
+four warnings found
+one error found