When you fork in AS perl under win32 (I think cygwin builds work differently), you aren't creating another process, You are instantiating another interpreter on a new thread. That's the tie-in to iThreads.

The "Free to wrong pool" indicates that a piece of memory allocated by one instance of the interpreter has come up for destruction by a different interpreter.

Quite how this is alleviated by the presence of a commented out line that references no variables I can't imagine, but as a fix, you might try requireing Win32::MMF::Shareable within each branch of the if( fork ) { statement.

I'm hazarding a guess that some load-time (BEGIN|INIT|CHECK} code is allocating a variable in the parent thread and the child thread is inheriting it and trying to free it.

This is mostly guesswork, but it would be worth a try.

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
Timing (and a little luck) are everything!

In reply to Re: Perl forking and shared memory strangeness under Windows by BrowserUk
in thread Perl forking and shared memory strangeness under Windows by Roger

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