1 files changed, 15 insertions, 0 deletions
diff --git a/error.c b/error.c
index 42f83682ea..834eede8af 100644
--- a/error.c
+++ b/error.c
@@ -812,6 +812,21 @@ rb_name_error(ID id, const char *fmt, ...)
     rb_exc_raise(exc);
 }
 
+void
+rb_name_error_str(VALUE str, const char *fmt, ...)
+{
+    VALUE exc, argv[2];
+    va_list args;
+
+    va_start(args, fmt);
+    argv[0] = rb_vsprintf(fmt, args);
+    va_end(args);
+
+    argv[1] = str;
+    exc = rb_class_new_instance(2, argv, rb_eNameError);
+    rb_exc_raise(exc);
+}
+
 /*
  * call-seq:
  *   NameError.new(msg [, name])  -> name_error