Yeah, nice find, this solution falls into the 'suppress warning' category: 
...
package IPC::Shareable;
sub UNTIE {};

package main;
...

[download]

In reply to Re^2: Unavoidable "untie attempted while inner references" with fork()? by saintmike
in thread Unavoidable "untie attempted while inner references" with fork()? by saintmike

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