Bug#978646: regression: %Y option fails to mark broken symlinks as "N"(nonexistent)

[Stephen Dowdy]

Package: findutils
Version: 4.6.0+git+20161106-2
Severity: important

Dear Maintainer,

This is a regression as it worked in Jessie and works again in Buster, but
fails in Stretch:
(note: i have a script to remove dangling symlinks that relied on
       'find ... -printf %Y' returning 'N' for broken symlinks that doesn't
       work because of this bug)

[Stretch]
(INcorrect behavior)
    $ lsb_release -cs
    stretch
    $ mkdir symlink-test
    $ cd symlink-test
    $ ln -sf /tmp fronk
    $ ln -sf /adfasdf blonk
    $ ln -sf spizzle spizzle
    $ find . -xdev -mindepth 1 -maxdepth 1 -type l -printf "%Y: %p  # ->%l \n"
    l: ./blonk  # ->/adfasdf 
** this symlink should be marked (N) Nonexistent, rather than l
    d: ./fronk  # ->/tmp 
    L: ./spizzle  # ->spizzle
** yay, 'find' identifies (self-referential) loops correctly

[Buster]
(correct behavior)

    $ lsb_release -cs
    buster
    $ mkdir symlink-test
    $ cd symlink-test
    $ ln -sf /tmp fronk
    $ ln -sf /adfasdf blonk
    $ ln -sf spizzle spizzle
    $ find . -xdev -mindepth 1 -maxdepth 1 -type l -printf "%Y: %p  # ->%l \n"
    L: ./spizzle  # ->spizzle 
    d: ./fronk  # ->/tmp 
    N: ./blonk  # ->/adfasdf
** this symlink is *correctly* marked (N) Nonexistent

[Jessie]
(correct behavior)
    $ mkdir symlink-test
    $ cd symlink-test
    $ ln -sf /tmp fronk
    $ ln -sf /adfasdf blonk
    $ ln -sf spizzle spizzle
    $ find . -xdev -mindepth 1 -maxdepth 1 -type l -printf "%Y: %p  # ->%l \n"
    L: ./spizzle  # ->spizzle 
    N: ./blonk  # ->/adfasdf 
** this symlink is *correctly* marked (N) Nonexistent
    d: ./fronk  # ->/tmp 

thanks,
--stephen

-- System Information:
Debian Release: 9.13
  APT prefers oldstable-updates
  APT policy: (500, 'oldstable-updates'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-0.bpo.9-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE= 
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages findutils depends on:
ii  libc6        2.24-11+deb9u4
ii  libselinux1  2.6-3+b3

findutils recommends no packages.

Versions of packages findutils suggests:
ii  mlocate  0.26-2

-- debconf-show failed