* file.c (realpath_rec): call rb_str_modify before rb_str_set_len.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28860 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/file.c b/file.c
index 712d60ef45..b541a7dba0 100644
--- a/file.c
+++ b/file.c
@@ -3229,6 +3229,7 @@ realpath_rec(long *prefixlenp, VALUE *resolvedp, char *unresolved, VALUE loopche
                 char *resolved_names = RSTRING_PTR(*resolvedp) + *prefixlenp;
                 char *lastsep = rb_path_last_separator(resolved_names);
                 long len = lastsep ? lastsep - resolved_names : 0;
+                rb_str_modify(*resolvedp);
                 rb_str_set_len(*resolvedp, *prefixlenp + len);
             }
         }