[Bug 1878517] Re: please apply bash 5.0 patch 17

[Matthieu Clemenceau]

** Changed in: bash (Ubuntu Focal)
       Status: Triaged => Confirmed

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Title:
  please apply bash 5.0 patch 17

Status in bash package in Ubuntu:
  In Progress
Status in bash source package in Focal:
  Confirmed

Bug description:
  I am using Ubuntu 20.04 for development and has hit a bug in bash 5.0
  patch 16.

  I can't reproduce it in pure bash, but with bats from
  https://github.com/bats-core/bats-core/ it is very easy to repro:

  ```
  # cat << EOF > ya.bats
  check() {
  	echo "check $@"
  	ls -l /proc/self/fd
  }

  @test "here file" {
  	check -p <(echo "hey")
  	false
  }
  EOF

  $ bats ya.bats
  ```

  Normally the output should contain the line

     lr-x------ 1 kir kir 64 May 14 02:01 63 -> pipe:[4616918]

  which is a result of a "here file" created by bash via <(echo "hey").

  In my testing, about 50% of runs don't have /dev/fd/63 listed.

  I found out this is a manifest of a bug introduced in bash 5.0 patch
  16 (see http://ftp.gnu.org/gnu/bash/bash-5.0-patches/bash50-016)

  The bug is fixed in 5.0 patch 17 (see
  http://ftp.gnu.org/gnu/bash/bash-5.0-patches/bash50-017).

  Please update bash to patchlevel 17.

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