merges r22121 from trunk into ruby_1_9_1.

* io.c (rb_io_s_binread): ensures file path.  [ruby-dev:37940]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@22519 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/io.c b/io.c
index 50eaa5f26..5a91e04c6 100644
--- a/io.c
+++ b/io.c
@@ -7292,6 +7292,7 @@ rb_io_s_binread(int argc, VALUE *argv, VALUE io)
     struct foreach_arg arg;
 
     rb_scan_args(argc, argv, "12", NULL, NULL, &offset);
+    FilePathValue(argv[0]);
     arg.io = rb_io_open(argv[0], rb_str_new_cstr("rb:ASCII-8BIT"), Qnil, Qnil);
     if (NIL_P(arg.io)) return Qnil;
     arg.argv = argv+1;