regexec

source of perl for linux application,

  regexec.c	

  This test generates "bad free" warnings when run under
  PERL_DESTRUCT_LEVEL.  This file merely serves as a placeholder
  for investigation.

  Complex regular subexpression recursion limit (%d) exceeded

        $_ = 'a' x (2**15+1); /^()(a\1)*$/ ;
  Complex regular subexpression recursion limit (%d) exceeded

        $_ = 'a' x (2**15+1); /^()(a\1)*?$/ ;

  (The actual value substituted for %d is masked in the tests so that
  REG_INFTY configuration variable value does not affect outcome.)
__END__
# regexec.c
print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
use warnings 'regexp' ;
$SIG{__WARN__} = sub{local ($m) = shift;
                 $m =~ s/\(\d+\)/(*MASKED*)/;
                 print STDERR $m};
$_ = 'a' x (2**15+1); 
/^()(a\1)*$/ ;
#
# If this test fails with a segmentation violation or similar,
# you may have to increase the default stacksize limit in your
# shell.  You may need superuser privileges.
#
# Under the sh, ksh, zsh:
#    $ ulimit -s
#    8192
#    $ ulimit -s 16000
#
# Under the csh:
#    % limit stacksize
#    stacksize        8192 kbytes
#    % limit stacksize 16000
#
EXPECT
Complex regular subexpression recursion limit (*MASKED*) exceeded at - line 9.
########
# regexec.c
print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
no warnings 'regexp' ;
$SIG{__WARN__} = sub{local ($m) = shift;
                 $m =~ s/\(\d+\)/(*MASKED*)/;
                 print STDERR $m};
$_ = 'a' x (2**15+1); 
/^()(a\1)*$/ ;
#
# If this test fails with a segmentation violation or similar,
# you may have to increase the default stacksize limit in your
# shell.  You may need superuser privileges.
#
# Under the sh, ksh, zsh:
#    $ ulimit -s
#    8192
#    $ ulimit -s 16000
#
# Under the csh:
#    % limit stacksize
#    stacksize        8192 kbytes
#    % limit stacksize 16000
#
EXPECT

########
# regexec.c
print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
use warnings 'regexp' ;
$SIG{__WARN__} = sub{local ($m) = shift;
                 $m =~ s/\(\d+\)/(*MASKED*)/;
                 print STDERR $m};
$_ = 'a' x (2**15+1);
/^()(a\1)*?$/ ;
#
# If this test fails with a segmentation violation or similar,
# you may have to increase the default stacksize limit in your
# shell.  You may need superuser privileges.
#
# Under the sh, ksh, zsh:
#    $ ulimit -s
#    8192
#    $ ulimit -s 16000
#
# Under the csh:
#    % limit stacksize
#    stacksize        8192 kbytes
#    % limit stacksize 16000
#
EXPECT
Complex regular subexpression recursion limit (*MASKED*) exceeded at - line 9.
########
# regexec.c
print("SKIPPED\n# most systems run into stacksize limits\n"),exit;
no warnings 'regexp' ;
$SIG{__WARN__} = sub{local ($m) = shift;
                 $m =~ s/\(\d+\)/(*MASKED*)/;
                 print STDERR $m};
$_ = 'a' x (2**15+1);
/^()(a\1)*?$/ ;
#
# If this test fails with a segmentation violation or similar,
# you may have to increase the default stacksize limit in your
# shell.  You may need superuser privileges.
#
# Under the sh, ksh, zsh:
#    $ ulimit -s
#    8192
#    $ ulimit -s 16000
#
# Under the csh:
#    % limit stacksize
#    stacksize        8192 kbytes
#    % limit stacksize 16000
#
EXPECT