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, 6 insertions, 4 deletions

diff --git a/test/files/neg/permanent-blindness.check b/test/files/neg/permanent-blindness.check
index 18b4543707..cdde201ef6 100644
--- a/test/files/neg/permanent-blindness.check
+++ b/test/files/neg/permanent-blindness.check
@@ -1,10 +1,12 @@
-permanent-blindness.scala:10: error: imported `Bippy' is permanently hidden by definition of class Bippy in package bar
+permanent-blindness.scala:10: warning: imported `Bippy' is permanently hidden by definition of class Bippy in package bar
   import foo.{ Bippy, Bop, Dingus }
                ^
-permanent-blindness.scala:10: error: imported `Bop' is permanently hidden by definition of object Bop in package bar
+permanent-blindness.scala:10: warning: imported `Bop' is permanently hidden by definition of object Bop in package bar
   import foo.{ Bippy, Bop, Dingus }
                       ^
-permanent-blindness.scala:10: error: imported `Dingus' is permanently hidden by definition of object Dingus in package bar
+permanent-blindness.scala:10: warning: imported `Dingus' is permanently hidden by definition of object Dingus in package bar
   import foo.{ Bippy, Bop, Dingus }
                            ^
-three errors found
+error: No warnings can be incurred under -Xfatal-warnings.
+three warnings found
+one error found