18 lines
1.1 KiB
Text
18 lines
1.1 KiB
Text
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There is a bug in Perl's handling of the %^H (lexical hints) variable that
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causes lexical state in one file to leak into another that is required/used
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from it. This bug will probably be fixed in Perl 5.10.2, and is definitely
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fixed in Perl 5.11.0, but in any earlier version it is necessary to work
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around it. On versions of Perl that require a fix, this module globally
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changes the behaviour of require and use so that they no longer exhibit the
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bug. This is the most convenient kind of workaround, and is meant to be
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invoked by modules that make use of lexical state.
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The workaround supplied by this module takes effect the first time its
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import method is called. Typically this will be done by means of a use
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statement. This should be done before putting anything into %^H that would
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have a problem with leakage; usually it suffices to do this when loading
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the module that supplies the mechanism to set up the vulnerable lexical
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state. Invoking this module multiple times, from multiple lexical-related
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modules, is not a problem: the workaround is only applied once, and applies
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to everything.
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