Tramp behavior differs in gnu and cygwin emacs

I've been using tramp via plink in cygwin's 32-bit emacs without any trouble and recently downloaded the 64-bit version from gnu.org.

That version doesn't connect using the same setup in my .emacs:

(require 'tramp)

(set-default 'tramp-default-method "plink")

(setq tramp-remote-path (append '("<MYREMOTEPATH>"

) tramp-remote-path ))

(setq shell-prompt-pattern "^[^#$%>\n]*[#$%>] *")

(set-default 'tramp-auto-save-directory "<MYLOCALPATH>")

(set-default 'tramp-default-user "<ME>")

(set-default 'tramp-default-host "<REMOTESERVER>")

When I attempt to connect, I get the message

Tramp: Opening connection for <me>@<there> using plink...

Couldn’t find local shell prompt for C:\Windows\system32\cmd.exe

Tramp: Opening connection for <me>@<there> using plink...failed

tramp-file-name-handler: Couldn’t find local shell prompt for C:\Windows\system32\cmd.exe

And yet I do get a prompt in the *tramp/plink <me>@<there>* window:

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

I've played around with shell-prompt-pattern, to no avail.

The (munged) result of setting debug to 10 is below.

Thanks!

Fred

;; GNU Emacs: 25.1.1 Tramp: 2.2.13.25.1 -*- mode: outline; -*-

;; Location: c:/bin/emacs/share/emacs/25.1/lisp/net/tramp.elc Git: nil

09:12:46.348416 tramp-get-file-property (8) # <myremotepath><myfilename> file-directory-p undef

09:12:46.349416 tramp-get-connection-property (7) # test test

09:12:46.349416 tramp-get-connection-property (7) # process-name nil

09:12:46.349416 tramp-get-connection-property (7) # process-buffer nil

09:12:46.349416 tramp-maybe-open-connection (3) # Opening connection for <me>@<there> using plink...

09:12:46.350416 tramp-get-local-locale (7) # locale C

09:12:46.350416 tramp-get-connection-property (7) # login-args undef

09:12:46.350416 tramp-get-connection-property (7) # process-name nil

09:12:46.350416 tramp-get-connection-property (7) # process-buffer nil

09:12:46.382617 tramp-set-connection-property (7) # vector [plink <me> <there> <myremotepath><myfilename> nil]

09:12:46.382617 tramp-maybe-open-connection (6) # C:\Windows\system32\cmd.exe

09:12:46.382617 tramp-get-connection-property (7) # vector [plink <me> <there> <myremotepath><myfilename> nil]

09:12:46.382617 tramp-get-connection-property (7) # check-remote-echo nil

09:12:46.382617 tramp-get-connection-property (7) # gateway nil

09:12:46.460620 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:46.460620 tramp-get-connection-property (7) # check-remote-echo nil

09:12:46.460620 tramp-get-connection-property (7) # gateway nil

09:12:47.496254 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:47.496254 tramp-get-connection-property (7) # check-remote-echo nil

09:12:47.496254 tramp-get-connection-property (7) # gateway nil

09:12:48.510286 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:48.510286 tramp-get-connection-property (7) # check-remote-echo nil

09:12:48.510286 tramp-get-connection-property (7) # gateway nil

09:12:49.512718 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:49.512718 tramp-get-connection-property (7) # check-remote-echo nil

09:12:49.512718 tramp-get-connection-property (7) # gateway nil

09:12:50.546352 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:50.546352 tramp-get-connection-property (7) # check-remote-echo nil

09:12:50.546352 tramp-get-connection-property (7) # gateway nil

09:12:51.547185 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:51.547185 tramp-get-connection-property (7) # check-remote-echo nil

09:12:51.547185 tramp-get-connection-property (7) # gateway nil

09:12:52.550618 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:52.550618 tramp-get-connection-property (7) # check-remote-echo nil

09:12:52.550618 tramp-get-connection-property (7) # gateway nil

09:12:53.566854 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:53.566854 tramp-get-connection-property (7) # check-remote-echo nil

09:12:53.566854 tramp-get-connection-property (7) # gateway nil

09:12:54.601487 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:54.601487 tramp-get-connection-property (7) # check-remote-echo nil

09:12:54.601487 tramp-get-connection-property (7) # gateway nil

09:12:55.602919 tramp-accept-process-output (10) # *tramp/plink <me>@<there>* run *tramp/plink <me>@<there>*

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:55.602919 tramp-get-connection-property (7) # check-remote-echo nil

09:12:55.602919 tramp-get-connection-property (7) # gateway nil

09:12:56.461947 tramp-wait-for-regexp (6) #

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:56.461947 tramp-wait-for-regexp (10) #

backtrace()

tramp-wait-for-regexp(#<process *tramp/plink <me>@<there>*> 10 "\\(^[^#$%>

]*[#$%>] *\\|\\(?:^\\|

\\)[^]#$%>

]*#?[]#$%>] *\$ \\[[0-9;]*[a-zA-Z] *\$*\\)\\'")

tramp-barf-if-no-shell-prompt(#<process *tramp/plink <me>@<there>*> 10 "Couldn't find local shell prompt for %s" "C:\\Windows\\system32\\cmd.exe")

tramp-maybe-open-connection(["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil])

tramp-send-command(["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil] "test -d <myremotepath><myfilename> 2>/dev/null; echo tramp_exit_status $?")

tramp-send-command-and-check(["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil] "test -d <myremotepath><myfilename>")

tramp-run-test("-d" "/plink:<me>@<there>:<myremotepath><myfilename>")

tramp-sh-handle-file-directory-p("/plink:<me>@<there>:<myremotepath><myfilename>")

apply(tramp-sh-handle-file-directory-p "/plink:<me>@<there>:<myremotepath><myfilename>")

tramp-sh-file-name-handler(file-directory-p "/plink:<me>@<there>:<myremotepath><myfilename>")

apply(tramp-sh-file-name-handler file-directory-p "/plink:<me>@<there>:<myremotepath><myfilename>")

tramp-file-name-handler(file-directory-p "/plink:<me>@<there>:<myremotepath><myfilename>")

file-directory-p("/plink:<me>@<there>:<myremotepath><myfilename>")

find-file-noselect("/plink:<me>@<there>:<myremotepath><myfilename>" nil nil t)

find-file("/plink:<me>@<there>:<myremotepath><myfilename>" t)

funcall-interactively(find-file "/plink:<me>@<there>:<myremotepath><myfilename>" t)

apply(funcall-interactively find-file ("/plink:<me>@<there>:<myremotepath><myfilename>" t))

repeat-complex-command(1)

funcall-interactively(repeat-complex-command 1)

call-interactively(repeat-complex-command nil nil)

command-execute(repeat-complex-command)

09:12:56.461947 tramp-wait-for-regexp (1) # File error: [[Regexp ‘\(^[^#$%>

]*[#$%>] *\|\(?:^\|

\)[^]#$%>

]*#?[]#$%>] *$ \[[0-9;]*[a-zA-Z] *$*\)\'’ not found in 10 secs]]

Microsoft Windows [Version 6.1.7601]

c:\Users\<me>\AppData\Local\Temp - Thu 03/23/2017 - 9:12:46.39 >

09:12:56.461947 tramp-get-connection-property (7) # vector [plink <me> <there> <myremotepath><myfilename> nil]

09:12:56.461947 tramp-process-sentinel (5) # Sentinel called: ‘#<process *tramp/plink <me>@<there>*>’ ‘killed

’

09:12:56.461947 tramp-flush-connection-property (7) # *tramp/plink <me>@<there>* (vector)

09:12:56.461947 tramp-get-file-property (8) # file-truename nil

09:12:56.461947 tramp-flush-directory-property (8) #

09:12:56.493148 tramp-get-connection-property (7) # process-buffer nil

09:12:56.493148 tramp-barf-if-no-shell-prompt (10) #

backtrace()

tramp-error(["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil] file-error "Couldn't find local shell prompt for %s" "C:\\Windows\\system32\\cmd.exe")

apply(tramp-error ["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil] file-error "Couldn't find local shell prompt for %s" "C:\\Windows\\system32\\cmd.exe")

tramp-error-with-buffer(#<buffer *tramp/plink <me>@<there>*> ["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil] file-error "Couldn't find local shell prompt for %s" "C:\\Windows\\system32\\cmd.exe")

apply(tramp-error-with-buffer #<buffer *tramp/plink <me>@<there>*> ["plink" "<me>" "<there>" "<myremotepath><myfilename>" nil] file-error ("Couldn't find local shell prompt for %s" "C:\\Windows\\system32\\cmd.exe"))