Perl doesn't know if you want to take a function then slice the result, or take a slice and pass that to the function. So you have to clarify as follows: 
my $var = "1:2:3:4:5:6";
my $x = (split":",$var)[4];

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In reply to Re: subroutine()[$x]; by tilly
in thread subroutine()[$x]; by devslashneil

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