2
The error really doesn't really effect the installation. This section of code is trying to determine the amount of memory required by the install task but it looks to me like there's a bug. The current code is:
$memory = substr( $out[5], strpos( $out[5], ':') + 1) . ' [Estimated]';
but I think it should be:
$memory = substr( $out[4], strpos( $out[4], ':') + 1) . ' [Estimated]';
the 'Mem Usage:' attribute is the 5th element which is index 4, not 5.