guile can't find a chinese named file

[Thomas Morley <thomasmorley65@gmail.com>]

[-- Attachment #1: Type: text/plain, Size: 1501 bytes --]

Hi all,

a chinese user came up with a weird problem.

He wants to process the string retrieved by (command-line) further, in
his file-name he used some chinese characters.
I tracked it down to the attached minimal example.
With guile-2.0.13 I get:

guile filename_名字.scm
;;; Stat of /home/hermann/Desktop/filename_??.scm failed:
;;; ERROR: In procedure stat: No such file or directory:
"/home/hermann/Desktop/filename_\u540d\u5b57.scm"
Backtrace:
In ice-9/boot-9.scm:
 160: 8 [catch #t #<catch-closure 55cae58fe4e0> ...]
In unknown file:
   ?: 7 [apply-smob/1 #<catch-closure 55cae58fe4e0>]
In ice-9/boot-9.scm:
  66: 6 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 5 [eval # #]
In ice-9/boot-9.scm:
2404: 4 [save-module-excursion #<procedure 55cae59209c0 at
ice-9/boot-9.scm:4051:3 ()>]
4058: 3 [#<procedure 55cae59209c0 at ice-9/boot-9.scm:4051:3 ()>]
1727: 2 [%start-stack load-stack ...]
1732: 1 [#<procedure 55cae5935db0 ()>]
In unknown file:
   ?: 0 [primitive-load "/home/hermann/Desktop/filename_\u540d\u5b57.scm"]

ERROR: In procedure primitive-load:
ERROR: In procedure open-file: No such file or directory:
"/home/hermann/Desktop/filename_\u540d\u5b57.scm"

What to do to make it work?
I messed around setting locales, to no avail so far.

Btw, the same with guile-1.8:
guile-1.8 filename_名字.scm

("filename_�\x90\x8d字.scm")
(filename_名字.scm)

The string is strange, but at least the file is found.

Cheers,
  Harm

[-- Attachment #2: filename_名字.scm --]
[-- Type: text/x-scheme, Size: 88 bytes --]

(newline)
(write (command-line))

(newline)
(write (map string->symbol (command-line)))