forked from PsychoticNinja/irssi
PUTBACK was being called even for the error path which didn't use the stack. Emitting the "script error" signal can involve running Perl code (Irssi:core::destroy) therefore the stack can be reallocated. This can result in the perl stack being corrupted because the local stack pointer is out of date (although as it's use of freed memory the crash is not always instant).