strace file type detection not work when use "strace -p "

When use 'strace -p <pid>' , got the file like below

Process 1049 attached - interrupt to quit
select(2, [0], [], NULL, NULL

Then vim's file type detection not work

--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php