Non-numeric strings evaluate as zero when used in arithmetic.
$ perl -lwe 'use strict; print int "NANNY"; print int "non-numeric";'
Argument "NANNY" isn't numeric in int at -e line 1.
Argument "non-numeric" isn't numeric in int at -e line 1.
That is to say: perl did not error out in seek() because the seek to zero offset was successful.
What is the reason for passing non-numeric offset? You will have to check the passed value yourself, or, better yet, fix the program logic to not pass a string where a number is expected!
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