[Bug 2129818] Re: 0.3.0 regression: ls: cannot access '/proc/self/fd/3': No such file or directory

[Julian Andres Klode]

Same on the host:

$ ls -l /proc/self/fd
ls: cannot access '/proc/self/fd/3': No such file or directory
total 0
lrwx------ 1 jak jak 64 Oct 25 21:49 0@ -> /dev/pts/8
lrwx------ 1 jak jak 64 Oct 25 21:49 1@ -> /dev/pts/8
lrwx------ 1 jak jak 64 Oct 25 21:49 2@ -> /dev/pts/8
lr-x------ 1 jak jak 64 Oct 25 21:49 3@

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https://bugs.launchpad.net/bugs/2129818

Title:
  0.3.0 regression: ls: cannot access '/proc/self/fd/3': No such file or
  directory

Status in rust-coreutils package in Ubuntu:
  New

Bug description:
  APT's test/integration/test-no-fds-leaked-to-maintainer-scripts fails
  with rust-coreutils 0.3.0

  This installs a test package that does ls -l /proc/self/fd in the
  maintainer scripts. The script is:

  #!/bin/sh
  set -x
  if [ -e '$(pwd)/rootdir/tmp/read_stdin' ]; then
  ▸   read line;
  ▸   echo "STDIN: -\$line-"
  fi
  ls -l /proc/self/fd/
  exit \$?

  the tail is:

  + ls -l /proc/self/fd/
  ls: cannot access '/proc/self/fd/3': No such file or directory
  total 0
  lr-x------ 1 root root 64 Oct 25 21:48 0 -> /dev/null
  lrwx------ 1 root root 64 Oct 25 21:48 1 -> /dev/pts/4
  lrwx------ 1 root root 64 Oct 25 21:48 2 -> /dev/pts/4
  lr-x------ 1 root root 64 Oct 25 21:48 3
  + exit 1

  This is likely related to the safe traversal feature.

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