Re: [ID 19991231.001] interpolation of $_ is busted

["M.J.T. Guy" <mjtg@cus.cam.ac.uk>]

Larry Wall <larry@wall.org> wrote
> This appears to be because you've got USE_THREADS defined.  That tends
> to lexicalize certain variables, which would tend to rule out lookup
> via the symbol name.  Except that ${_} should not be looked up at
> runtime in any event.  It has probably confused one or another of
> the #ifdef USE_THREADS kludges, is my guess.  I don't have a USE_THREADS
> version compiled up here, so someone else will need to chase this down,
> unless I get around to it first.

I can confirm that it doesn't fail on 5.005_62 without threads.

It seems like this is all pointing to a very long standing bug (or is it
a misfeature?)   -   the [] causes ${a} to be taken as global, not lexical:

% perl5.002 -we '$a="b"; my $a="a"; print "${a}[]\n"'
b[]

%perl5.002 -we '$a="b"; my $a="a"; print "${a}\[]\n"'
a[]



Mike Guy

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