I have seen a STDERR message roughly(from memory) like:
Thread terminated panic: MUTEX_LOCK (22) (shared.xs line 199) myfilename linenumber
It is on a line that is a 'lock' of a shared hash of shared sub-hashes, with 9000+ entries.

And I am hoping to track down what this means and what would have caused that. I have source for 'shared.xs' (http://cpansearch.perl.org/src/NWCLARK/perl-5.8.8/ext/threads/shared/shared.xs) which I am hoping is the most recent (but am running 5.10 on Fedora).

?What does the (22) signify?
?Line 199 seems to be the end of a structure instance with empty pointers to functions, not actual code. ( MGVTBL sharedsv_shared_vtbl = { )
? is a 'panic' caused by a macro call, or assert or what? What is the coding style Perl source>

It is always better to have seen your target for yourself, rather than depend upon someone else's description.

In reply to panic: MUTEX_LOCK (22) - what should I look for? by Wiggins

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