[Bug 139097] Re: dash variable expansion error using local, readonly, and export

[Ian! D. Allen]

This dash bug appears to be fixed in Ubuntu 24.04.1 LTS
dash Version: 0.5.12-6ubuntu5

The bug still exists in Ubuntu 20.04.6 LTS
dash Version: 0.5.10.2-6

$ x='1 2 3'          
$ export y=$x
dash: 2: export: 2: bad variable name

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https://bugs.launchpad.net/bugs/139097

Title:
  dash variable expansion error using local, readonly, and export

Status in dash package in Ubuntu:
  Confirmed

Bug description:
  <pre>
  Binary package hint: dash

  [Edited May 2010]
  True for all dash up to at least May 2010.

  Bug in variable expansion (incorrect word-splitting) using an assignment
  with "local", "readonly", or "export in dash:

  $ x='1 2 3'
  $ y=$x                                # this works fine
  $ echo "$y"
  1 2 3

  $ local y=$x                          # this fails due to dash bug
  local: 2: bad variable name
  $ echo "$y"
  1

  $ readonly y=$x                        # this fails due to dash bug
  readonly: 2: bad variable name

  $ export y=$x                          # this fails due to dash bug
  export: 2: bad variable name

  The same use of assignment using "local", "readonly" and "export" all work
  fine in bash:

  bash-3.2$ x='1 2 3'
  bash-3.2$ y=$x
  bash-3.2$ echo "$y"
  1 2 3
  bash-3.2$ local y=$x
  bash: local: can only be used in a function
  bash-3.2$ foo () {
  > local y=$x
  > echo "$y"
  > }
  bash-3.2$ foo
  1 2 3

  bash-3.2$ readonly y=$x                 # works fine

  bash-3.2$ export y=$x                   # works fine

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