Update compiler/src/dotty/tools/dotc/core/TypeEval.scala

Co-authored-by: Guillaume Martres <[email protected]>

Author: aherlihy

compiler/src/dotty/tools/dotc/core/TypeEval.scala

@@ -115,7 +115,7 @@ object TypeEval:
             val fieldTypesOpt = tupleElementTypes(arg)
             fieldTypesOpt match
               case Some(fieldTypes) =>
-                val fieldLabels = fieldTypes.zipWithIndex.map((_, i) => ConstantType(Constant(s"_$i")))
+                val fieldLabels = (for i <- 1 to fieldTypes.length yield ConstantType(Constant(s"_$i")))).toList
                 Some:
                   defn.NamedTupleTypeRef.appliedTo:
                     nestedPairs(fieldLabels) :: nestedPairs(fieldTypes) :: Nil