I ran your code on my system with perl-5.10.0, perl-5.11.0, perl-5.11.3, perl-5.11.4, perl-5.12.0 and perl-5.13.8 and all behave as expected.

I also tested it on another debian machine with perl-5.10.0 and that behaves as expected as well.

This of course does not tell that much since you are using perl-5.10.1 with different ./Configure options and with different patches...

What I suggest: install strace and strace the program to see what the system fcntl call really returns.

A second suggestion, maybe more complex, is to install a stock perl-5.10.1 (without patches that is) and attempt to reproduce it with that.

Update (2011-08-22 07:09 UTC): I ran my tests on 32 bit systems; running it on a 64 bit system confirms the same problem

In reply to Re: fcntl failure after eval by Animator
in thread fcntl failure after eval by flipper

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