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Re: local %SIG = (%SIG, $signame => ...) not working as expected?

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Uri Guttman
January 12, 2021 20:53
Re: local %SIG = (%SIG, $signame => ...) not working as expected?
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On 1/12/21 3:40 PM, Corwin Brust wrote:
> Hi Eric!
> On Tue, Jan 12, 2021 at 1:32 PM Eric Wong <> wrote:
>> I've relied on a similar thing "local %ENV = (%ENV, k => $v)"
>> for ages, so is this anomaly for %SIG documented/expected?
> I wonder if you could be running into an entry in %ENV with a undef
> value?  In that case we could end up with an odd number of
> hash-elements and worse.  Perl will ignore the undef values from
> hashes "exploded" within parens, e.g. within the ... part of @x = (
> ... ).  When we come to assign the resulting list back into a new hash
> we then get "misalignments".

i wonder why he copies %ENV. he should be able to just do:

     local( $SIG{$signame} ) = blah ;

the is faster and doesn't have the odd number thing you mention


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