[Bug 1661691] Re: TERM=xterm enables mouse mode in vi, breaks pasting with middle mouse

[Scott Moser]

Adam,

I'm not sure that we should pick up delta for this.  If upstream vim and
upstream debian both enabled this new behavior, we may just want to
accept it.  Once you learn about 'shift', then i think its acceptable.

Additionally, any one who writes their own vimrc (like you or I or
ubuntu developers) are going to not see this issue... which is why we
only saw it in a container, and I never even noticed it in a ssh vm
because I have user-data that sets up .vimrc there.

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Title:
  TERM=xterm enables mouse mode in vi, breaks pasting with middle mouse

Status in vim package in Ubuntu:
  In Progress
Status in vim source package in Zesty:
  In Progress

Bug description:
  I quite often have the following work flow:

  a.) lxc launch ubuntu-daily:zesty z1
  b.) lxc exec z1 /bin/bash
  c.) % vi foo.txt
  d.) paste some thing from my X buffer (hit middle mouse button).

  Somewhere between yakkety (2:7.4.1829-1ubuntu2.1) and zesty
  (2:8.0.0095-1ubuntu2) this behavior changed.

  Previously this all worked fine.

  Now, in zesty, however an attempt to paste results in a vi error message:
   E353: Nothing in register "

  to fix this, you can first disable the mouse 'a' [1]

   : set mouse-=a

  
  I'm not sure what is enabling this, because /usr/share/vim/vimrc has the line
  set mouse=a commented out.

  --
  [1] http://www.varesano.net/blog/fabio/disable%20vim%20automatic%20visual%20mode%20using%20mouse

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: vim-nox 2:8.0.0095-1ubuntu2
  ProcVersionSignature: Ubuntu 4.9.0-12.13-generic 4.9.2
  Uname: Linux 4.9.0-12-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.20.4-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Feb  3 12:14:20 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (561 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: vim
  UpgradeStatus: No upgrade log present (probably fresh install)

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