src/interpreter: fast_cstring was broken in interpreter

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>

diff --git a/src/interpreter/naive_interpreter.nit b/src/interpreter/naive_interpreter.nit
index 23a7b0c..b484f15 100644 (file)
--- a/src/interpreter/naive_interpreter.nit
+++ b/src/interpreter/naive_interpreter.nit
@@ -1154,8 +1154,8 @@ redef class AMethPropdef
                        else if pname == "atoi" then
                                return v.int_instance(recvval.atoi)
                        else if pname == "fast_cstring" then
-                               var ns = recvval.to_s.substring_from(args[1].to_i)
-                               return v.native_string_instance(ns)
+                               var ns = recvval.fast_cstring(args[1].to_i)
+                               return v.native_string_instance(ns.to_s)
                        end
                else if pname == "calloc_string" then
                        return v.native_string_instance_len(args[1].to_i)