tramp (2.1.19): Problem with tramp_vc_registered_read_file_names

[David Rothenberger]

I'm hitting a problem with tramp 2.1.19 that I wasn't seeing with
2.1.18. First, I should mention that I'm using XEmacs 21.4.22 under
Cygwin (yes, I know).

When I connect to slower machines (e.g., other Cygwin machines),
tramp-handle-vc-registered fails with the error "Couldn't find exit
status of vc_registered_read_file_names".

tramp sends a command like this to the remote machine:

    tramp_vc_registered_read_file_names <<'EOF'
    /file/name/1
    /file/name/2
    EOF
     2>/dev/null; echo tramp_exit_status $?

This is actually two commands due to the here document, so PS1
occurs twice: once after the output of
tramp_vc_registered_read_file_names and once after the "echo
tramp_exit_status" stuff. Unfortunately, tramp-wait-for-output
sometimes returns after seeing the first PS1, which seems to confuse
tramp-send-command-and-check.

At least, I *think* that's what's going on. Sometimes repeatedly
trying to open the remote file will cause the error to go away. I
see this mostly on slower remote machines, but occasionally on fast
local Linux machines, too.

-- 
David Rothenberger  ----  address@hidden