Wtf? If I comment out the print, it once again errors right off the bat saying the third column is null, and if I uncomment it again, it runs fine?

the $1..$3 aren't localized on entering a sub, therefore any sub that uses a regular expression somewhere *might* invalidate the references to the special regex capture variables, like:

  ...
  $_ = 'the small print';

  if( /^\s*(\S+)\s+(\S+)\s+(.+\S)\s*$/ ) {
    sub1( 'replace into reference_code values (?,?,?)', $1, $2, $3 )
  }
 
 sub sub1 {
    my $p0 = shift;
    # try to comment this line out and get your lesson
    print "looks like a statement somewhere\n" if  $p0 =~ /\w+/;
    
    my ($p1, $p2, $p3) = @_;
    print "statement parameters: $p1, $p2, $p3\n";
 }
 ...

[download]

Are you sure your program really did run without errors - only by inserting the "print" line?

BTW, interpolation of $1..$3 in the sub call (as has been suggested) also does the trick (by instantiating anonymous copies of $1..$3):

 ...
 sub1( 'replace into reference_code values (?,?,?)', "$1", "$2", "$3" 
+)
 ...

[download]

Regards

mwa

In reply to Re: Bitten by the lazy execution bug? by mwah
in thread Bitten by the lazy execution bug? by Anonymous Monk

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