Merge pull request #2550 from scalamacros/2.10.x

[nomaster] unbreaks test.bc

1 files changed, 3 insertions, 0 deletions

diff --git a/src/reflect/scala/reflect/runtime/JavaMirrors.scala b/src/reflect/scala/reflect/runtime/JavaMirrors.scala
index 09b07bb2c7..ed4458c455 100644
--- a/src/reflect/scala/reflect/runtime/JavaMirrors.scala
+++ b/src/reflect/scala/reflect/runtime/JavaMirrors.scala
@@ -287,6 +287,9 @@ private[reflect] trait JavaMirrors extends internal.SymbolTable with api.JavaUni
         // if (!symbol.isMutable) ErrorSetImmutableField(symbol)
         jfield.set(receiver, value)
       }
+      // this dummy method is necessary to prevent the optimizer from stripping off ErrorSetImmutableField
+      // which would break binary compatibility with 2.10.0
+      private def dummy(symbol: Symbol) = ErrorSetImmutableField(symbol)
       override def toString = s"field mirror for ${symbol.fullName} (bound to $receiver)"
     }