• Vim 8.0 patch 500
  • gnome-terminal 3.18.3 on Ubuntu 16.04 running Unity

Function keys in my vim slightly misbehave, however, in an annoying way: I can't completely use them in my macros. After much trial and error I have given up and think I need help here. Please? :)

Mapping Function keys works

  • nmap <F2><F2> :echo 'works!'<CR>
  • also works: nmap <Leader>2 <F2><F2>

But if I record a macro with function keys in it, it sometimes works, sometimes not. This is what I get when I record a macro with an <F9> in it:

  • The macro is typed as "w<F9>p (put style invocation of something with register w)
  • replaying the macro however, leads to the invocation of my ex command at the receiving end of the mapping with v:register set to a
  • Pasting the macro register yields "w�k9p, which vim renders as vim rendering of pasted macro register and which xxd tells me is the byte string 2277 806b 3970
  • Typing <C-V><F9> in insert mode yields ^[[20~ and I think that is what vim is also expecting to see when <F9> is used in a mapping. It is also what I see when I type F9 into plain cat.

Many of my mappings involve function keys and I want to fix this once and for all. My attempts to date involved the following:

nmap ?k9 <F9>

where the ? is the literal pasted <80> thingy from before. Upon loading that file again, the bracketed representation did not appear again; however, I have confirmed with xxd that the exact byte representation of the symbol in .vimrc is still 80.

Another one through the use of

set <F9>=^[[20~

(inserted literally with <C-V> as you'd expect)

To no avail. Please help me so that I can use the F9 key in a macro! thanks!

Edit 1:

In GVim, I get the exact same behavior. This means, it is not the fault of my terminal emulator, right?

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