BEGIN blocks run before the rest of the code in the module is even interpreted, so at the time when BEGIN { say __PACKAGE__."::begin $variable"; } runs, the lexical variable $variable has not been created, so the global variable of that name is used, and it has no value; hence the warning.

Solution: don't close over lexical variables in BEGIN blocks.

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In reply to Re:Use of uninitialised value... but it is defined ?! by BrowserUk
in thread Use of uninitialised value... but it is defined ?! by seki

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