Bug#872302: vim sends cursor-blink sequence to terminal

[Jeff King]

Package: vim
Version: 2:8.0.0946-1
Severity: normal
Tags: upstream

Normally the cursor in my terminal (urxvt) does not blink. With older
versions of vim, running:

  vim -u NONE -U NONE -N

does not change that.  Since upgrading to 8.0.0946, running the same
command causes the cursor in vim to start blinking, and it continues
blinking after exiting vim.

I can reproduce the problem by building upstream vim. The problem
bisects to 3cd43cccc (patch 8.0.0918: cannot get terminal window cursor
shape or attributes, 2017-08-12). I see that commit added more support
for setting the cursor-start-color, but I don't see any indication that
it should change the default to blink.

-- Package-specific info:

--- real paths of main Vim binaries ---
/usr/bin/vi is /usr/bin/vim.basic
/usr/bin/vim is /usr/bin/vim.basic

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.12.0-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages vim depends on:
ii  libacl1      2.2.52-3+b1
ii  libc6        2.24-14
ii  libgpm2      1.20.4-6.2+b1
ii  libselinux1  2.6-3+b2
ii  libtinfo5    6.0+20170715-2
ii  vim-common   2:8.0.0946-1
ii  vim-runtime  2:8.0.0946-1

vim recommends no packages.

Versions of packages vim suggests:
ii  exuberant-ctags [ctags]  1:5.9~svn20110310-11
pn  vim-doc                  <none>
pn  vim-scripts              <none>

-- no debconf information