Fix problem with non-ASCII characters in ediff error messages

* lisp/vc/ediff-diff.el (ediff-prepare-error-list): Decode the
data from diff before displaying (bug#5050).  This fixes a problem
with displaying raw bytes in the error messages in non-ASCII locales.

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/vc/ediff-diff.el b/lisp/vc/ediff-diff.el
index ef466741b24..ccf5a7807f2 100644
--- a/lisp/vc/ediff-diff.el
+++ b/lisp/vc/ediff-diff.el
@@ -325,6 +325,10 @@ one optional arguments, diff-number to refine.")
             (error-buf ediff-error-buffer))
         (ediff-skip-unsuitable-frames)
         (switch-to-buffer error-buf)
+        ;; We output data from the diff command using `raw-text' as
+        ;; the coding system, so decode before displaying.
+        (when (eq ediff-coding-system-for-read 'raw-text)
+          (decode-coding-region (point-min) (point-max) 'undecided))
         (ediff-kill-buffer-carefully ctl-buf)
         (user-error "Errors in diff output.  Diff output is in %S" diff-buff))))