Use of uninitialized value in concatenation (.) or string

mikeraz has asked for the wisdom of the Perl Monks concerning the following question:

Well this should be a no brainer:

Use of uninitialized value in concatenation (.) or string at
        /usr/lib/perl5/5.8.5/Net/OUR/DNS.pm line 139 (#1)

Where:
139 print __LINE__, " our_fqdn called with $host state_code $state_cod
+e and thus region of $region_code \n";

Outputs:
139 our_fqdn called with scdor44s4q1rr.nw.us.our-dns.com state_code OR
+ and thus region of NW
[download]

All the values are being printed, indicating to my mind that they were initialized. But Perl says otherwise.

Cluestick whack requested.

Be Appropriate && Follow Your Curiosity

Comment on Use of uninitialized value in concatenation (.) or string Download Code

Replies are listed 'Best First'.
Re: Use of uninitialized value in concatenation (.) or string by cdarke (Prior) on Apr 15, 2010 at 15:31 UTC
The line shown appears to be correct - I tried it with values for the variables. So, I hate to ask the basic questions but it has got to come down to one of these: 1. Are you using warnings and strict? If you are not using strict then you might wish to consider setting it on as a test using `-Mstrict` on the command-line. 2. Are you certain that the line you show is really the line it is reporting the error on? Could it be using a different version of the module? By the way, 5.12 reports the variable name that is uninitialized.	[reply] [d/l]
Re: Use of uninitialized value in concatenation (.) or string by ikegami (Patriarch) on Apr 15, 2010 at 15:31 UTC
Maybe the warning isn't coming from that line, or maybe it's coming from a different run of that line.	[reply]
Re^2: Use of uninitialized value in concatenation (.) or string by mikeraz (Friar) on Apr 15, 2010 at 16:09 UTC
That appears to be the case. The debug messages were popping up out of sync with the calling program print statements. Thank you. Be Appropriate && Follow Your Curiosity	[reply]
Re: Use of uninitialized value in concatenation (.) or string by choroba (Cardinal) on Apr 15, 2010 at 15:20 UTC
Strange indeed. Can you show neighbouring lines in the code and in the output as well?	[reply]

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