#101 Invalid multibyte or wide char in test file causes crash with tk9.0

[DorothyR]

invoking the jun17 version of tkdiff with wish9.0 on the two files uploaded here, an error happens. It doesn't happen with wish8.6. I have no idea what the multibyte character is but it seems to be in both dirdiff and tkdirdiff.

tildChk: SPLIT frags(dirdiff) INITIALIZATION
Dbg: +++ Default V9 1st Frag newf1(dirdiff) to later update canon
Dbg: *** REWROTE(result(1)) CANON(dirdiff) w/converted 1st frag(dirdiff)
tildChk: SPLIT frags(tkdirdiff) INITIALIZATION
Dbg: +++ Default V9 1st Frag newf1(tkdirdiff) to later update canon
Dbg: *** REWROTE(result(1)) CANON(tkdirdiff) w/converted 1st frag(tkdirdiff)
Error in startup script: error reading "file6": invalid or incomplete multibyte or wide character
while executing
"read $hndl"
(procedure "rediff" line 21)
invoked from within
"rediff "
(procedure "check-error" line 18)
invoked from within
"check-error $result $output"
(procedure "do-diff" line 20)
invoked from within
"do-diff"
(procedure "main" line 101)
invoked from within
"main"
(file "/home/dorothyr/Downloads/tkdiff-jun17" line 18692)

[DorothyR]

Filetype gives a clue, although I don't know how or why this happened

$ file *
cvsdiff: POSIX shell script, ASCII text executable
dirdiff: POSIX shell script, ISO-8859 text executable
tkdirdiff: POSIX shell script, ISO-8859 text executable

[DorothyR]

Here's the relevant tcl9.0 manpage
https://www.tcl-lang.org/man/tcl9.0/TclCmd/chan.html#M48

On Sun, Jun 22, 2025 at 12:52 PM DorothyR dorothyr@users.sourceforge.net
wrote:

Filetype gives a clue, although I don't know how or why this happened

$ file *
cvsdiff: POSIX shell script, ASCII text executable
dirdiff: POSIX shell script, ISO-8859 text executable
tkdirdiff: POSIX shell script, ISO-8859 text executable

---

[bugs:#101] Invalid multibyte or wide char in test file causes crash
with tk9.0

Status: open
Group: V5.7
Created: Sun Jun 22, 2025 07:49 PM UTC by DorothyR
Last Updated: Sun Jun 22, 2025 07:49 PM UTC
Owner: nobody
Attachments:

• dirdiff
  (129.3 kB; application/octet-stream)
• tkdirdiff (85.1 kB;
  application/octet-stream)

invoking the jun17 version of tkdiff with wish9.0 on the two files
uploaded here, an error happens. It doesn't happen with wish8.6. I have
no idea what the multibyte character is but it seems to be in both dirdiff
and tkdirdiff.

tildChk: SPLIT frags(dirdiff) INITIALIZATION
Dbg: +++ Default V9 1st Frag newf1(dirdiff) to later update canon
Dbg: *** REWROTE(result(1)) CANON(dirdiff) w/converted 1st frag(dirdiff)
tildChk: SPLIT frags(tkdirdiff) INITIALIZATION
Dbg: +++ Default V9 1st Frag newf1(tkdirdiff) to later update canon
Dbg: *** REWROTE(result(1)) CANON(tkdirdiff) w/converted 1st
frag(tkdirdiff)
Error in startup script: error reading "file6": invalid or incomplete
multibyte or wide character
while executing
"read $hndl"
(procedure "rediff" line 21)
invoked from within
"rediff "
(procedure "check-error" line 18)
invoked from within
"check-error $result $output"
(procedure "do-diff" line 20)
invoked from within
"do-diff"
(procedure "main" line 101)
invoked from within
"main"
(file "/home/dorothyr/Downloads/tkdiff-jun17" line 18692)

---

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[DorothyR]

Oh great it's the copyright string:
776:Copyright � 1999-2005 Paul Mackerras

Here's the relevant tcl9.0 document
https://www.tcl-lang.org/man/tcl9.0/TclCmd/chan.html#M48