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There is a bug in Perl's handling of the %^H (lexical hints) variable thatcauses lexical state in one file to leak into another that is required/usedfrom it. This bug will probably be fixed in Perl 5.10.2, and is definitelyfixed in Perl 5.11.0, but in any earlier version it is necessary to workaround it. On versions of Perl that require a fix, this module globallychanges the behaviour of require and use so that they no longer exhibit thebug. This is the most convenient kind of workaround, and is meant to beinvoked by modules that make use of lexical state.The workaround supplied by this module takes effect the first time itsimport method is called. Typically this will be done by means of a usestatement. This should be done before putting anything into %^H that wouldhave a problem with leakage; usually it suffices to do this when loadingthe module that supplies the mechanism to set up the vulnerable lexicalstate. Invoking this module multiple times, from multiple lexical-relatedmodules, is not a problem: the workaround is only applied once, and appliesto everything.