Created -Yfatal-warnings, as otherwise I can't ...

Created -Yfatal-warnings, as otherwise I can't see how to make partest
fail on the presence of an unchecked warning. It'll come in handy
anyway. Now we have a real tough guy's command line for those who want
it:

% scalac -unchecked -deprecation -Yfatal-warnings `find . -name
'*.scala'`

Not for the timid.  Review by community.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/compiler/scala/tools/nsc/Global.scala b/src/compiler/scala/tools/nsc/Global.scala
index 4e14ec6fb1..92c72b1549 100644
--- a/src/compiler/scala/tools/nsc/Global.scala
+++ b/src/compiler/scala/tools/nsc/Global.scala
@@ -136,7 +136,9 @@ class Global(var settings: Settings, var reporter: Reporter) extends SymbolTable
 // ------------------ Reporting -------------------------------------
 
   def error(msg: String) = reporter.error(NoPosition, msg)
-  def warning(msg: String) = reporter.warning(NoPosition, msg)
+  def warning(msg: String) =
+    if (settings.Ywarnfatal.value) reporter.error(NoPosition, msg)
+    else reporter.warning(NoPosition, msg)
   def inform(msg: String) = reporter.info(NoPosition, msg, true)
   def inform[T](msg: String, value: T): T = { inform(msg+value); value }