There is only one $_ in your program and you did use it for two different purposes. One has to be careful sometimes with Perl's build-in variables.

From "Modern Perl", page 7: http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf

As English gets confusing when you have too many pronouns and antecedents, you must take care mixing uses of $_ implicitly or explicitly. Uncautious simultaneous use of $_ may lead to one piece of code silently overwriting the value written by another. If you write a function which uses $_, you may clobber a caller function's use of $_.

UPDATE: In order to make your script more robust overall, you might also want to remove $_ from your outer loop. 

foreach my $regex (@regexes){
    ($fileBodyMatch, $decode ) = checkFileBody ($file, $regex->{bodyre
+gex});
}

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In reply to Re^3: Strange Global Array issue by hdb
in thread Strange Global Array issue by Anonymous Monk

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