CtrlP breaks unnamed (") register about ctrlp.vim HOT 3 CLOSED

I can't reproduce this. I tested in both gVim and terminal Vim on Linux and Windows, the content of " stays the same before and after opening a file.

This is rather odd because the only register that CtrlP touches is v and it gets restored after gv"vy. There's nothing that does anything with the " register.

Can you consistently reproduce this? Does it happens if you comment out the gv"vy line?

Also, try loading a minimal vimrc with no other plugin and see if it still happens:

vim --noplugin -u {path/to/a/simple/.vimrc}

And have only this line in the above vimrc:

se nocp
runtime! plugin/ctrlp.vim

Just make sure the parent directory of plugin/ is in your runtimepath, for example ~/.vim or $HOME/vimfiles.

from ctrlp.vim.

I'm using gVim on Winows 7.

Can you consistently reproduce this?

Yes, but

Does it happens if you comment out the gv"vy line?

Not.

I tested with vim --noplugin -u blank_vimrc (blank_vimrc doesn't contain anything), unnamed register is still overridden with a empty string because "v register doesn't have anything.

Vim help (:help quotequote) says:

1. Unnamed register ""
   Vim fills this register with text deleted with the "d", "c", "s", "x" commands
   or copied with the yank "y" command, regardless of whether or not a specific
   register was used (e.g. "xdd).

I think gv"vy use "v and "" (unnamed) register. Is it wrong?

from ctrlp.vim.

No, you're correct. I didn't know it does that. I'll push a fix soon.

Thanks for reporting this!

from ctrlp.vim.