c:\@Work\Perl>perl -wMstrict -le
"print 'perl version ', $];
 ;;
 my @HR;
 ;;
 printf qq{A: %s \n}, @HR;
 ;;
 ++$#HR;
 printf qq{B: %s \n}, @HR;
"
perl version 5.008009
Use of uninitialized value in printf at -e line 1.
A:
Use of uninitialized value in printf at -e line 1.
B:

perl version 5.010001
Use of uninitialized value in printf at -e line 1.
A:
Use of uninitialized value in printf at -e line 1.
B:

perl version 5.012003
Missing argument in printf at -e line 1.
A:
Use of uninitialized value in printf at -e line 1.
B:

perl version 5.014004
Missing argument in printf at -e line 1.
A:
Use of uninitialized value in printf at -e line 1.
B: