Re: [PATCH] test-lib: check Bash version for '-x' without using shell arrays

On Wed, Jan 02, 2019 at 12:19:49AM +0100, SZEDER Gábor wrote:

To my understanding both shells are right and conform to POSIX,
because the standard allows both behavior by stating the following
under '2.8.1 Consequences of Shell Errors':

  "An expansion error is one that occurs when the shell expansions
  define in wordexp are carried out (for example, "${x!y}", because

That "define" above always stops my (non-native) English parser for a
moment or two...  shouldn't it be s/define/defined/ ?

It's not a copy-paste error, POSIX does indeed write "define" there,
see:

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_08_01

(First paragraph below the table and the Notes.)

  '!' is not a valid operator); an implementation may treat these as
  syntax errors if it is able to detect them during tokenization,
  rather than during expansion."