Fix eta expansion

revios fix crashed for nullary functions
mpociecha · Dec 19, 2015 · ded374a · ded374a
1 parent 05bc8a0
commit ded374a
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/dotty/tools/dotc/typer/EtaExpansion.scala b/src/dotty/tools/dotc/typer/EtaExpansion.scala
@@ -142,7 +142,8 @@ object EtaExpansion {
     val params = (mt.paramNames, paramTypes).zipped.map((name, tpe) =>
       ValDef(name, TypeTree(tpe), EmptyTree).withFlags(Synthetic | Param).withPos(tree.pos))
     var ids: List[Tree] = mt.paramNames map (name => Ident(name).withPos(tree.pos))
-    if (mt.paramTypes.last.isRepeatedParam)ids = ids.init :+ repeated(ids.last)
+    if (mt.paramTypes.nonEmpty && mt.paramTypes.last.isRepeatedParam)
+      ids = ids.init :+ repeated(ids.last)
     val body = Apply(lifted, ids)
     val fn = untpd.Function(params, body)
     if (defs.nonEmpty) untpd.Block(defs.toList map untpd.TypedSplice, fn) else fn