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, 9 insertions, 7 deletions

diff --git a/test/files/neg/t4749.check b/test/files/neg/t4749.check
index 93ad3935fa..34eed6e433 100644
--- a/test/files/neg/t4749.check
+++ b/test/files/neg/t4749.check
@@ -1,28 +1,30 @@
-t4749.scala:2: error: Fail1 has a main method with parameter type Array[String], but bippy.Fail1 will not be a runnable program.
+t4749.scala:2: warning: Fail1 has a main method with parameter type Array[String], but bippy.Fail1 will not be a runnable program.
   Reason: main method must have exact signature (Array[String])Unit
   object Fail1 {
          ^
-t4749.scala:6: error: Fail2 has a main method with parameter type Array[String], but bippy.Fail2 will not be a runnable program.
+t4749.scala:6: warning: Fail2 has a main method with parameter type Array[String], but bippy.Fail2 will not be a runnable program.
   Reason: main methods cannot be generic.
   object Fail2 {
          ^
-t4749.scala:13: error: Fail3 has a main method with parameter type Array[String], but bippy.Fail3 will not be a runnable program.
+t4749.scala:13: warning: Fail3 has a main method with parameter type Array[String], but bippy.Fail3 will not be a runnable program.
   Reason: main methods cannot refer to type parameters or abstract types.
   object Fail3 extends Bippy[Unit] { }
          ^
-t4749.scala:16: error: Fail4 has a main method with parameter type Array[String], but bippy.Fail4 will not be a runnable program.
+t4749.scala:16: warning: Fail4 has a main method with parameter type Array[String], but bippy.Fail4 will not be a runnable program.
   Reason: companion is a trait, which means no static forwarder can be generated.
 
   object Fail4 {
          ^
-t4749.scala:21: error: Fail5 has a main method with parameter type Array[String], but bippy.Fail5 will not be a runnable program.
+t4749.scala:21: warning: Fail5 has a main method with parameter type Array[String], but bippy.Fail5 will not be a runnable program.
   Reason: companion contains its own main method, which means no static forwarder can be generated.
 
   object Fail5 extends Fail5 { }    
          ^
-t4749.scala:26: error: Fail6 has a main method with parameter type Array[String], but bippy.Fail6 will not be a runnable program.
+t4749.scala:26: warning: Fail6 has a main method with parameter type Array[String], but bippy.Fail6 will not be a runnable program.
   Reason: companion contains its own main method (implementation restriction: no main is allowed, regardless of signature), which means no static forwarder can be generated.
 
   object Fail6 {
          ^
-6 errors found
+error: No warnings can be incurred under -Xfatal-warnings.
+6 warnings found
+one error found