bug#20662: 25.0.50; Remote copy through Dired fails

[Michael Albinus]

Manuel Uberti <manuel.uberti@inventati.org> writes:

Hi Manuel,

> Ok, doing (setq tramp-verbose 6) worked.
>
> Find attached the contents of debug buffer.

Well, there we see the error:

> 15:20:00.426281 tramp-send-command (6) # (gzip 
> </home/admin/boccaperta/contabilita/fattureods/078_crowdknitting.ods | 
> base64) 2>/dev/null; echo tramp_exit_status $?
> 15:20:00.598776 tramp-wait-for-regexp (6) #
> H4sIABPTZlUAA7z7c3hdfdQ1jMZsbNu2k8a2bdt2G6dpbDSNbbMNGtu2bZ+dtPfzvO93fef8eXJ1

[...]

> Trph5TngXwcw7PMDEPL/D44yxE6mbQIA
> tramp_exit_status 0
> ///86d4cea2951efb10b1992a77e8407734#$
> 15:20:00.615227 tramp-sh-handle-file-local-copy (3) # Encoding remote file 
> `/ssh:admin@192.168.1.50#2130:/home/admin/boccaperta/contabilita/fattureods/078_crowdknitting.ods'
>  with `(gzip <%s | base64)'...done

> 15:20:00.621261 tramp-sh-handle-file-local-copy (3) # Decoding local file 
> `/tmp/tramp.1285C2x.ods' with `(lambda (beg end) (base64-decode-region beg 
> end) (let ((coding-system-for-write (quote binary)) (coding-system-for-read 
> (quote binary))) (apply (quote call-process-region) (point-min) (point-max) 
> (car (split-string gzip -d)) t t nil (cdr (split-string gzip -d)))))'...
> 15:20:00.627375 tramp-sh-handle-file-local-copy (3) # Decoding local file 
> `/tmp/tramp.1285C2x.ods' with `(lambda (beg end) (base64-decode-region beg 
> end) (let ((coding-system-for-write (quote binary)) (coding-system-for-read 
> (quote binary))) (apply (quote call-process-region) (point-min) (point-max) 
> (car (split-string gzip -d)) t t nil (cdr (split-string gzip -d)))))'...failed

Unfortunately, the trace does not tell us what went wrong with
`call-process-region'. I've committed a patch to the Emacs repository
improving the trace. Could you, please, rebuild Emacs and rerun the test
with `tramp-verbose' set to 6? The debug buffer might tell us more then.

> Regards,
>
> Manuel Uberti

Best regards, Michael.