[cc65] ca65html bug report: "Use of uninitialized value in sprintf at /usr/bin/ca65html line 579"

Hello,

I am using ca65html and I keep getting some error message, regardless of
which file I try to handle:

$ ca65html --colorize --htmldir /tmp/www/cbmrom.html/c64/ --linelabels --linenumbers -cvttabs source/c64/c64.a65
[...]
Use of uninitialized value in sprintf at /usr/bin/ca65html line 579, <INPUT> line XXXX.
[...]

The line numbers XXXX vary, of course.

I also tried with a "minimalistic" command line ("ca65html
source/c64/c64.a65"), the problem remains.

I don't know much about perl. Nevertheless, I tried to add the output of
the different variables to find out which one is the culprit. I did the
following before the offending line:

$ diff -u cc65-snapshot-2.11.9.20070329/src/ca65html/ca65html /tmp/www/cbmrom/ca65html
--- cc65-snapshot-2.11.9.20070329/src/ca65html/ca65html	2007-02-10 19:22:43.000000000 +0100
+++ /tmp/www/cbmrom/ca65html	2007-05-20 10:23:21.000000000 +0200
@@ -576,6 +576,11 @@
 	    $Label = $Labels{$OutName}{$Id};
 
 	    # Print the label with a tag
+printf STDERR "label = %s\n", $Label;
+printf STDERR "1 = %s\n", $1;
+printf STDERR "2 = %s\n", $2;
+printf STDERR "3 = %s\n", $3;
+printf STDERR "4 = %s\n", $4;
        	    $OutLine .= sprintf ("<a name=\"%s\">%s%s</a>%s%s", $Label, $1, $2, $3, $4);
 	}

With the help of this, I found out that $4 is not defined, as the error
message from above duplicates in the line where $4 is output.

I don't know how to debug this further, as I do not know enough about
perl.

BTW: I am almost sure it worked before, this is what baffles me. I call
ca65html from an automated script whenever the sources change.
Unfortunately, they did not change for quite some time, so, I cannot
tell for sure when it broke.

Regards,
   Spiro.

-- 
Spiro R. Trikaliotis                              http://opencbm.sf.net/
http://www.trikaliotis.net/                     http://www.viceteam.org/
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