entering tst() leaving tst() entering tst() leaving tst() entering tst() leaving tst() Use of uninitialized value $bla in hash element at perlmonks-1063097.pl line 16. entering tst() Use of uninitialized value in scalar assignment at perlmonks-1063097.pl line 6. leaving tst() Use of uninitialized value $bla in hash element at perlmonks-1063097.pl line 18. entering tst() Use of uninitialized value in scalar assignment at perlmonks-1063097.pl line 6. leaving tst()