Code before warnings are enabled at line 10, column 1.  See page 431 of PBP.  (Severity: 4)
Return value of "close" ignored at line 191, column 2.  Check the return value of "close" for success.  (Severity: 2)
"die" used instead of "croak" at line 204, column 6.  See page 283 of PBP.  (Severity: 3)
"die" used instead of "croak" at line 207, column 45.  See page 283 of PBP.  (Severity: 3)