Restrict treee copiers with default arguments to trees with more than 2 elements.

It's not really an abbreviation to do it for trees with fewer elements and it leads
to unncessessary syntactic variation.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/dotty/tools/dotc/ast/Desugar.scala b/src/dotty/tools/dotc/ast/Desugar.scala
index fcaef9730..cfb9c338f 100644
--- a/src/dotty/tools/dotc/ast/Desugar.scala
+++ b/src/dotty/tools/dotc/ast/Desugar.scala
@@ -504,8 +504,8 @@ object desugar {
    */
   def block(tree: Block)(implicit ctx: Context): Block = tree.expr match {
     case EmptyTree =>
-      cpy.Block(tree)(
-        expr = unitLiteral withPos (if (tree.stats.isEmpty) tree.pos else tree.pos.endPos))
+      cpy.Block(tree)(tree.stats,
+        unitLiteral withPos (if (tree.stats.isEmpty) tree.pos else tree.pos.endPos))
     case _ =>
       tree
   }