Can you give a bit of working code (edit: I mean, code that give that error) that demonstrates the problem (using XML::Validator::Schema if you have to)?

As noted here, there are limits, but maybe you can work around it.

Also, these paragraphs in http://search.cpan.org/src/NWCLARK/perl-5.8.4/hints/machten.sh claim that you can compile perl with higher limits on regex repeats, irrespective of the architecture defaults: 

# Set reg_infty -- the maximum allowable number of repeats in regular
# expressions such as  /a{1,$max_repeats}/, and the maximum number of
# times /a*/ will match.  Setting this too high without having a stack
# large enough to accommodate deep recursion in the regular expression
# engine allows perl to crash your Mac due to stack overrun if it
# encounters a pathological regular expression.  The default is a
# compromise between capability and required stack size (see below).
# You may override the default value from the Configure command-line
# like this:
#
#   Configure -Dreg_infty=16368 ...

reg_infty=${reg_infty:-2047}

# If you want to have many perl processes active simultaneously --
# processing CGI forms -- for example, you should opt for a small stac
+k.
# For safety, you should set reg_infty no larger than the correspondin
+g
# value given in this table:
#
# Stack size  reg_infty value supported
# ----------  -------------------------
# 128k        2**8-1    (256)
# 256k        2**9-1    (511)
# 512k        2**10-1  (1023)
#   1M        2**11-1  (2047)
# ...
#  16M        2**15-1 (32767) (perl's default value)

# This script selects a safe stack size based on the value of reg_inft
+y
# specified above.  However, you may choose to take a risk and set
# stack size lower: pathological regular expressions are rare in real-
+world
# programs.  But be aware that, if perl does encounter one, it WILL
# crash your system.  Do not set stack size lower than 96k unless
# you want perl's installation tests ( make test ) to crash your syste
+m.
#
# You may override the default value from the Configure command-line
# by specifying the required size in kilobytes like this:
#
#   Configure -Dstack_size=96

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In reply to Re^3: Is there a hard limit on + in a regex? by Joost
in thread Is there a hard limit on + in a regex? by samtregar

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