I ran into some strange behaviour using Date::Manip 6.40 on perl 5.12.4 in Fedora 14 and I'm wondering if anyone has any thoughts on it.

Running the following code:

#!/usr/bin/perl
use strict;
use Date::Manip;
Date_Init("TZ=+0930");
my $localtime = "1349541878";
printf("%s:%s:%s\n", $localtime, scalar localtime( $localtime ), UnixD
+ate( scalar localtime( $localtime ), qq{%Y-%m-%d %H:%M:%S} ) );
$localtime = "1362112603";
printf("%s:%s:%s\n", $localtime, scalar localtime( $localtime ), UnixD
+ate( scalar localtime( $localtime ), qq{%Y-%m-%d %H:%M:%S} ) );
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Returns:

WARNING: [printf] Object must contain a valid date
Missing argument in printf at /tmp/time.pl line 8.
1349541878:Sun Oct  7 02:14:38 2012:
1362112603:Fri Mar  1 14:06:43 2013:2013-03-01 14:06:43
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Now, that's a real time zone (Australian Central Standard Time), in case anyone was wondering.

• The same problem occurs if the Date_Init("TZ=+0930"); directive to Date_Init("TZ=+1000"); (Australian Eastern Standard Time)
• The correct timestamp is returned if I change the Date_Init("TZ=+0930"); directive to Date_Init("TZ=+0900"); (Japan Standard Time)
• The correct timestamp is returned if I remove the Date_Init("TZ=+0930"); directive.
• The message isn't reported the several thousand other times I tested with when parsing several years worth of log files (there's a lot of possible times in the universe, so bear with me for not testing them all ;) )

Anyone have any insight into this issue?

The error was originally experienced on Date::Manip 6.22, upgrading to 6.40 removed the WARNING message, but reproduced the same behaviour.

Now, I don't need to resolve the issue, but am interested in understanding it. I appreciate any info.