Hi everyone, Calling a subroutine from a regular expression causes a crash when I then try to create/join a thread. Looks like this messes up some internal stuff. Here is the code: 
#!/usr/bin/perl
use threads;
use Thread::Semaphore;

sub bad{
    
    sub mysub{
        print "my sub : $1 $2\n";
    }
    $a="Hi there and hi there.\n";
    $a =~ s/(\w+ \w+)(?{mysub();})//gi ;
}


    
sub mythread
{
    print "begin\n";
    print "end\n";
}
                    

bad();

my $thr = threads->new(\&mythread);
@r=$thr ->join();

__END__

[download]
The output is: 
  ./testthread.pl 
my sub : Hi there 
my sub : and hi 
begin
end

*** glibc detected *** /usr/bin/perl: double free or corruption (!prev
+): 0x08271ce8 ***

[download]
Does anyone know what's wrong with using a regex this way ? If found it very convenient to process every pattern matching my regex, but I suppose I'll have to do it another way. Thank you.

In reply to Thread crash by DrCarib

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