file.c: refine message

* file.c (rb_get_path_check_convert): refine the error message
  when the path name contains null byte.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57336 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/file.c b/file.c
index 55ed82954a..bc928f3dec 100644
--- a/file.c
+++ b/file.c
@@ -195,7 +195,9 @@ rb_get_path_check_convert(VALUE obj, VALUE tmp, int level)
     }
 
     check_path_encoding(tmp);
-    StringValueCStr(tmp);
+    if (!rb_str_to_cstr(tmp)) {
+	rb_raise(rb_eArgError, "path name contains null byte");
+    }
 
     return rb_str_new4(tmp);
 }