Op 21-12-18 om 07:53 schreef Bart Schaefer:
> On Thu, Dec 20, 2018 at 2:48 PM Martijn Dekker <martijn@inlv.org> wrote:
>>> tc-so:Executing command [ zsh --emulate sh -c wait 1 ]
>>> tc-se:Fail: incorrect exit status: 1, expected: 127
> 
> Probably easily fixed.

Well, kind of.

I got as far as the attached patch, but it turns out there is another 
bug with 'wait': '(wait %1)' in a subshell quietly returns status 0 even 
if there is no such job. ('(wait %2)' and up are ok.)

I can't figure out how to solve that bug, and perhaps that's for another 
patch anyway, so there is one regression test failure in the attached 
patch (in the second test, where 'wait' is run in a subshell with 
POSIX_BUILTINS set).

I also suppressed the warnings for POSIX_BUILTINS. As Robert Elz already 
suspected, POSIX says: "If one or more pid operands are specified that 
represent unknown process IDs, wait shall treat them as if they were 
known process IDs that exited with exit status 127."[*] (note that 'pid 
operands' include job specs like %1). That means no warnings. (bash 
prints warnings in posix mode too, but, according to my testing, no 
other shell does.)

Thanks,

- M.

[*] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/wait.html