How to prevent vim asking to reload /dev/fd?

Hi,

After I run the following command (in MacVim),

vimdiff <(seq 3) <(seq 4)

then switch to another window and switch it back, vim will ask me something like this.

W11: Warning: File "/dev/fd/63" has changed since editing started
See ":help W11" for more info.
[O]K, (L)oad File, Load File (a)nd Options:

My ~/.vimrc has this line.

autocmd BufRead /dev/fd/* setlocal noautoread

If I remove it, vimdiff will automatically update the screen corresponding to /dev/fd/*, so the screen then will contain empty content.

How to completely disable vim from reload /dev/fd/* (not even asking anything)?

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