bug#60011: 30.0.50; git commit from *vc-diff* does not work over tramp

[Sam Steingold]

I run Emacs locally (macosx laptop) and edit remote (Amazon Linux "cloud
desktop") files using tramp (scp).
I can commit files using vc/git just fine.
However, when I edit *vc-diff* and hit C-v v v (vc-next-action), and
then edit the commit message abd hit C-c C-c, I get this error:

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (error "Failed (status 128): git --no-pager apply 
--cached...")
  signal(error ("Failed (status 128): git --no-pager apply --cached..."))
  error("Failed (%s): %s" "status 128" "git --no-pager apply --cached 
/var/folders/20/__3t...")
  vc-do-command("*vc*" 0 "git" 
"/var/folders/20/__3tt7vx6wg51x8xvqdc1cmw0000gr/T/g..." "--no-pager" "apply" 
"--cached")
  apply(vc-do-command "*vc*" 0 "git" 
"/var/folders/20/__3tt7vx6wg51x8xvqdc1cmw0000gr/T/g..." ("--no-pager" "apply" 
"--cached"))
  vc-git-command(nil 0 "/var/folders/20/__3tt7vx6wg51x8xvqdc1cmw0000gr/T/g..." 
"apply" "--cached")
  vc-git-checkin(nil #("Summary: TEE: split pairs_mx into make_da2mt_mx an..." 
...
  vc-git-checkin-patch(#("diff --git a/TEE/lucindex.py 
b/TEE/lucindex.py\nind..." ...
  apply(vc-git-checkin-patch (#("diff --git a/TEE/lucindex.py 
b/TEE/lucindex.py\nind..." ...
  vc-call-backend(Git checkin-patch #("diff --git a/TEE/lucindex.py 
b/TEE/lucindex.py\nind..." ...
  #f(compiled-function (files comment) #<bytecode 0x1dfec5afeaefa0a0>) ...
  vc-finish-logentry()
  funcall-interactively(vc-finish-logentry)
  call-interactively(vc-finish-logentry)
  log-edit-done()
  funcall-interactively(log-edit-done)
  call-interactively(log-edit-done nil nil)
  command-execute(log-edit-done)
--8<---------------cut here---------------end--------------->8---


and *vc* says

--8<---------------cut here---------------start------------->8---
error: can't open patch 
'/var/folders/20/__3tt7vx6wg51x8xvqdc1cmw0000gr/T/git-patchAWaImM': No such 
file or directory
--8<---------------cut here---------------end--------------->8---

this is a _local_ directory - it exists on the laptop but not on the
"cloud desktop".




In GNU Emacs 30.0.50 (build 2, x86_64-apple-darwin21.6.0, NS
 appkit-2113.60 Version 12.6.1 (Build 21G217)) of 2022-12-12 built on
 3c22fb11fdab.ant.amazon.com
Repository revision: 5325d815af43a36ea8571851e272c3d39bc19252
Repository branch: master
Windowing system distributor 'Apple', version 10.3.2113
System Description:  macOS 12.6.1

Configured using:
 'configure --with-imagemagick --with-mailutils --with-ns
 PKG_CONFIG_PATH='

Configured features:
ACL GIF GMP GNUTLS IMAGEMAGICK JPEG JSON LCMS2 LIBXML2 MODULES NOTIFY
KQUEUE NS PDUMPER PNG SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP XIM
ZLIB

Important settings:
  value of $LC_MESSAGES: C
  value of $LANG: C
  locale-coding-system: utf-8-unix

Major mode: ELisp/l

Minor modes in effect:
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  bug-reference-prog-mode: t
  pyvenv-mode: t
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  show-paren-mode: t
  electric-indent-mode: t
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  file-name-shadow-mode: t
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  font-lock-mode: t
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Load-path shadows:
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multi-tty make-network-process emacs)

Memory information:
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 (strings 32 262476 9487)
 (string-bytes 1 7246730)
 (vectors 16 110814)
 (vector-slots 8 2207864 131822)
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 (intervals 56 17739 877)
 (buffers 976 105))

-- 
Sam Steingold (https://aphar.dreamwidth.org/) on darwin Ns 10.3.2113
https://lastingimpactpsychology.com https://steingoldpsychology.com
https://iris.org.il https://fairforall.org http://think-israel.org
A bullet affects the way the brain functions even when it hits the butt.