I suppose it is in this line 

print STDERR $line,"\n";

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Even I have come across cases where perl slightly miscalculates the line numbers when reporting them in errors or warnings. My guess is because that's the print statement that has a concatenation. So please try to print the Dumper of @lines array and see where the undef comes in that array. Also probably seeing what $/ variable has can help diagnose further. Please also check the documentation for the split method for knowing when it can return an undef in the resulting list.


Thanks,
Ganesh

In reply to Re: "uninitialized value in concatenation" is initialized and involves no concatenation that I can see. by ganeshk
in thread "uninitialized value in concatenation" is initialized and involves no concatenation that I can see. by hesco

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