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+package Carp;
+
+our $VERSION = '1.09';
+# this file is an utra-lightweight stub. The first time a function is
+# called, Carp::Heavy is loaded, and the real short/longmessmess_jmp
+# subs are installed
+
+our $MaxEvalLen = 0;
+our $Verbose    = 0;
+our $CarpLevel  = 0;
+our $MaxArgLen  = 64;   # How much of each argument to print. 0 = all.
+our $MaxArgNums = 8;    # How many arguments to print. 0 = all.
+
+require Exporter;
+our @ISA = ('Exporter');
+our @EXPORT = qw(confess croak carp);
+our @EXPORT_OK = qw(cluck verbose longmess shortmess);
+our @EXPORT_FAIL = qw(verbose);	# hook to enable verbose mode
+
+# if the caller specifies verbose usage ("perl -MCarp=verbose script.pl")
+# then the following method will be called by the Exporter which knows
+# to do this thanks to @EXPORT_FAIL, above.  $_[1] will contain the word
+# 'verbose'.
+
+sub export_fail { shift; $Verbose = shift if $_[0] eq 'verbose'; @_ }
+
+# fixed hooks for stashes to point to
+sub longmess  { goto &longmess_jmp }
+sub shortmess { goto &shortmess_jmp }
+# these two are replaced when Carp::Heavy is loaded
+sub longmess_jmp  {
+    local($@, $!);
+    eval { require Carp::Heavy };
+    return $@ if $@;
+    goto &longmess_real;
+}
+sub shortmess_jmp  {
+    local($@, $!);
+    eval { require Carp::Heavy };
+    return $@ if $@;
+    goto &shortmess_real;
+}
+
+sub croak   { die  shortmess @_ }
+sub confess { die  longmess  @_ }
+sub carp    { warn shortmess @_ }
+sub cluck   { warn longmess  @_ }
+
+1;
+__END__
+
+=head1 NAME
+
+carp    - warn of errors (from perspective of caller)
+
+cluck   - warn of errors with stack backtrace
+          (not exported by default)
+
+croak   - die of errors (from perspective of caller)
+
+confess - die of errors with stack backtrace
+
+=head1 SYNOPSIS
+
+    use Carp;
+    croak "We're outta here!";
+
+    use Carp qw(cluck);
+    cluck "This is how we got here!";
+
+=head1 DESCRIPTION
+
+The Carp routines are useful in your own modules because
+they act like die() or warn(), but with a message which is more
+likely to be useful to a user of your module.  In the case of
+cluck, confess, and longmess that context is a summary of every
+call in the call-stack.  For a shorter message you can use C<carp>
+or C<croak> which report the error as being from where your module
+was called.  There is no guarantee that that is where the error
+was, but it is a good educated guess.
+
+You can also alter the way the output and logic of C<Carp> works, by
+changing some global variables in the C<Carp> namespace. See the
+section on C<GLOBAL VARIABLES> below.
+
+Here is a more complete description of how c<carp> and c<croak> work.
+What they do is search the call-stack for a function call stack where
+they have not been told that there shouldn't be an error.  If every
+call is marked safe, they give up and give a full stack backtrace
+instead.  In other words they presume that the first likely looking
+potential suspect is guilty.  Their rules for telling whether
+a call shouldn't generate errors work as follows:
+
+=over 4
+
+=item 1.
+
+Any call from a package to itself is safe.
+
+=item 2.
+
+Packages claim that there won't be errors on calls to or from
+packages explicitly marked as safe by inclusion in C<@CARP_NOT>, or
+(if that array is empty) C<@ISA>.  The ability to override what
+@ISA says is new in 5.8.
+
+=item 3.
+
+The trust in item 2 is transitive.  If A trusts B, and B
+trusts C, then A trusts C.  So if you do not override C<@ISA>
+with C<@CARP_NOT>, then this trust relationship is identical to,
+"inherits from".
+
+=item 4.
+
+Any call from an internal Perl module is safe.  (Nothing keeps
+user modules from marking themselves as internal to Perl, but
+this practice is discouraged.)
+
+=item 5.
+
+Any call to Perl's warning system (eg Carp itself) is safe.
+(This rule is what keeps it from reporting the error at the
+point where you call C<carp> or C<croak>.)
+
+=item 6.
+
+C<$Carp::CarpLevel> can be set to skip a fixed number of additional
+call levels.  Using this is not recommended because it is very
+difficult to get it to behave correctly.
+
+=back
+
+=head2 Forcing a Stack Trace
+
+As a debugging aid, you can force Carp to treat a croak as a confess
+and a carp as a cluck across I<all> modules. In other words, force a
+detailed stack trace to be given.  This can be very helpful when trying
+to understand why, or from where, a warning or error is being generated.
+
+This feature is enabled by 'importing' the non-existent symbol
+'verbose'. You would typically enable it by saying
+
+    perl -MCarp=verbose script.pl
+
+or by including the string C<-MCarp=verbose> in the PERL5OPT
+environment variable.
+
+Alternately, you can set the global variable C<$Carp::Verbose> to true.
+See the C<GLOBAL VARIABLES> section below.
+
+=head1 GLOBAL VARIABLES
+
+=head2 $Carp::MaxEvalLen
+
+This variable determines how many characters of a string-eval are to
+be shown in the output. Use a value of C<0> to show all text.
+
+Defaults to C<0>.
+
+=head2 $Carp::MaxArgLen
+
+This variable determines how many characters of each argument to a
+function to print. Use a value of C<0> to show the full length of the
+argument.
+
+Defaults to C<64>.
+
+=head2 $Carp::MaxArgNums
+
+This variable determines how many arguments to each function to show.
+Use a value of C<0> to show all arguments to a function call.
+
+Defaults to C<8>.
+
+=head2 $Carp::Verbose
+
+This variable makes C<carp> and C<cluck> generate stack backtraces
+just like C<cluck> and C<confess>.  This is how C<use Carp 'verbose'>
+is implemented internally.
+
+Defaults to C<0>.
+
+=head2 %Carp::Internal
+
+This says what packages are internal to Perl.  C<Carp> will never
+report an error as being from a line in a package that is internal to
+Perl.  For example:
+
+    $Carp::Internal{ __PACKAGE__ }++;
+    # time passes...
+    sub foo { ... or confess("whatever") };
+
+would give a full stack backtrace starting from the first caller
+outside of __PACKAGE__.  (Unless that package was also internal to
+Perl.)
+
+=head2 %Carp::CarpInternal
+
+This says which packages are internal to Perl's warning system.  For
+generating a full stack backtrace this is the same as being internal
+to Perl, the stack backtrace will not start inside packages that are
+listed in C<%Carp::CarpInternal>.  But it is slightly different for
+the summary message generated by C<carp> or C<croak>.  There errors
+will not be reported on any lines that are calling packages in
+C<%Carp::CarpInternal>.
+
+For example C<Carp> itself is listed in C<%Carp::CarpInternal>.
+Therefore the full stack backtrace from C<confess> will not start
+inside of C<Carp>, and the short message from calling C<croak> is
+not placed on the line where C<croak> was called.
+
+=head2 $Carp::CarpLevel
+
+This variable determines how many additional call frames are to be
+skipped that would not otherwise be when reporting where an error
+occurred on a call to one of C<Carp>'s functions.  It is fairly easy
+to count these call frames on calls that generate a full stack
+backtrace.  However it is much harder to do this accounting for calls
+that generate a short message.  Usually people skip too many call
+frames.  If they are lucky they skip enough that C<Carp> goes all of
+the way through the call stack, realizes that something is wrong, and
+then generates a full stack backtrace.  If they are unlucky then the
+error is reported from somewhere misleading very high in the call
+stack.
+
+Therefore it is best to avoid C<$Carp::CarpLevel>.  Instead use
+C<@CARP_NOT>, C<%Carp::Internal> and %Carp::CarpInternal>.
+
+Defaults to C<0>.
+
+=head1 BUGS
+
+The Carp routines don't handle exception objects currently.
+If called with a first argument that is a reference, they simply
+call die() or warn(), as appropriate.
+