[Bug 1376329] Re: readarray doesn't work with pipes

[xhienne]

This is not a bug but the expected behavior.

Due to the use of a pipe, "readarray blah" is executed in a sub-shell.
But "echo ${blah[@]}" is executed in the parent shell. This has nothing
to do with readarray, the command ": | blah=blah; echo $blah" would also
fail to output blah.

On the other hand, this will work because both readarray and echo execute in the same subshell:
$ cat /tmp/foo | ( readarray blah; echo "${blah[@]}" )

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https://bugs.launchpad.net/bugs/1376329

Title:
  readarray doesn't work with pipes

Status in bash package in Ubuntu:
  New

Bug description:
  (echo one 1 ; echo two 2 ; echo three 3) > /tmp/foo

  #works
  readarray blah < /tmp/foo
  echo "${blah[@]}"

  # doesn't work:
  unset blah
  cat /tmp/foo | readarray blah
  echo "${blah[@]}"

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