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Re: [perl #79824] hash value sharing breakage

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August 28, 2013 14:57
Re: [perl #79824] hash value sharing breakage
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Father Chrysostomos via RT wrote:
>According to our records, your request regarding 
>  "hash value sharing breakage" 
>has been resolved. 

My original pure-Perl test case still exhibits the problem that I
reported, in perl 5.18.1 and 5.19.3.

$ perl5.18.1 -MEncode -lwe '%a=("L\x{c3}\x{a9}on"=>"acme"); ($k)=(keys %a); Encode::_utf8_on($k); %h = ($k => "acme"); print $h{"L\x{e9}on"}'
Use of uninitialized value in print at -e line 1.

Either this case should start working, perhaps by Encode::_utf8_on()
performing some COW operation, or the documentation for Encode::_utf8_on()
needs more caveats.  (Currently it has a big warning about UTF-8
well-formedness, but this usage does not fall foul of that.)

Using utf8::decode() instead of Encode::_utf8_on() does not exhibit the
problem in perl 5.14 and above.  (In perl 5.12 it did.)


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