Merge pull request #22119 from hashicorp/b-chunklist-empty-list

lang/funcs: Pass through empty list in chunklist

lang/funcs/collection.go

@@ -392,6 +392,10 @@ var ChunklistFunc = function.New(&function.Spec{
 			return cty.UnknownVal(retType), nil
 		}
 
+		if listVal.LengthInt() == 0 {
+			return cty.ListValEmpty(listVal.Type()), nil
+		}
+
 		var size int
 		err = gocty.FromCtyValue(args[1], &size)
 		if err != nil {

lang/funcs/collection_test.go

@@ -1097,6 +1097,12 @@ func TestChunklist(t *testing.T) {
 			cty.UnknownVal(cty.List(cty.List(cty.String))),
 			false,
 		},
+		{
+			cty.ListValEmpty(cty.String),
+			cty.NumberIntVal(3),
+			cty.ListValEmpty(cty.List(cty.String)),
+			false,
+		},
 	}
 
 	for i, test := range tests {