Does anyone know what may cause this error?

Can't locate object method "" via package "IO::File" at G:\path\to\mys
+cript.pl line 1189

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It happens very intermittently. I have run the script thousands of times in a loop unable to reproduce the problem, but I have seen it twice. This is line 1189: 
my $chunk = $th->join();

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That line is in an "output" thread. It is using a file handle, and will write the data contained in $chunk (2D array reference) to a file using Text::CSV_XS. The thread it is joining is one of many "worker" threads which do not use file handles. The "input" thread which starts the worker threads does use a file handle and reads a different file using Text::CSV_XS. The "input" and "output" threads both require the Text::CSV_XS module (depending on arguments passed to script), so they will both load the module rather than inherit it from the parent thread.

Using Perl 5.18.2 on Windows. I have not seen it on Linux yet.

UPDATE: POTENTIAL SOLUTION BELOW

It happens on Windows or Linux.

In reply to Can't locate object method "" by chris212

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