1 package # hide from PAUSE
4 use DBIx::Class::StartupCheck; # load es early as we can, usually a noop
9 my $mro_recursor_stack;
12 package # hide from pause
25 BROKEN_FORK => (OS_NAME eq 'MSWin32') ? 1 : 0,
27 BROKEN_GOTO => ( PERL_VERSION < 5.008003 ) ? 1 : 0,
29 # perl -MScalar::Util=weaken -e 'weaken( $hash{key} = \"value" )'
30 BROKEN_WEAK_SCALARREF_VALUES => ( PERL_VERSION < 5.008003 ) ? 1 : 0,
32 HAS_ITHREADS => $Config{useithreads} ? 1 : 0,
34 UNSTABLE_DOLLARAT => ( PERL_VERSION < 5.013002 ) ? 1 : 0,
38 # the "DBIC_" prefix below is crucial - this is what makes CI pick up
39 # all envvars without further adjusting its scripts
40 # DO NOT CHANGE to the more logical { $_ => !!( $ENV{"DBIC_$_"} ) }
42 { substr($_, 5) => !!( $ENV{$_} ) }
44 DBIC_SHUFFLE_UNORDERED_RESULTSETS
45 DBIC_ASSERT_NO_INTERNAL_WANTARRAY
46 DBIC_ASSERT_NO_INTERNAL_INDIRECT_CALLS
47 DBIC_STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE
48 DBIC_STRESSTEST_COLUMN_INFO_UNAWARE_STORAGE
52 IV_SIZE => $Config{ivsize},
55 if ( PERL_VERSION < 5.009_005) {
57 constant->import( OLD_MRO => 1 );
60 # Yes, I know this is a rather PHP-ish name, but please first read
61 # https://metacpan.org/source/BOBTFISH/MRO-Compat-0.12/lib/MRO/Compat.pm#L363-368
63 # Even if we are using Class::C3::XS it still won't work, as doing
64 # defined( *{ "SubClass::"->{$_} }{CODE} )
65 # will set pkg_gen to the same value for SubClass and *ALL PARENTS*
67 *DBIx::Class::_Util::get_real_pkg_gen = sub ($) {
71 # the non-assign-unless-there-is-a-hash is deliberate
72 ( $mro_recursor_stack->{cache} || {} )->{$_[0]}{gen} ||= (
73 Math::BigInt->new( '0x' . ( Digest::MD5::md5_hex( join "\0", map {
75 ( $mro_recursor_stack->{cache} || {} )->{$_}{methlist} ||= do {
80 # RV to be hashed up and turned into a number
85 # stringification should be sufficient, ignore names/refaddr entirely
87 attributes::get( $_ ),
91 # skip dummy C::C3 helper crefs
92 ! ( ( $Class::C3::MRO{$class} || {} )->{methods}{$_} )
95 ref(\ "${class}::"->{$_} ) ne 'GLOB'
97 defined( *{ "${class}::"->{$_} }{CODE} )
100 ? ( \&{"${class}::$_"} )
103 keys %{ "${class}::" }
109 ( $mro_recursor_stack->{cache} || {} )->{$_[0]}{linear_isa}
111 mro::get_linear_isa($_[0])
115 ( $mro_recursor_stack->{cache} || {} )->{$_[0]}{is_universal}
117 mro::is_universal($_[0])
119 ( $mro_recursor_stack->{cache} || {} )->{UNIVERSAL}{linear_isa}
121 mro::get_linear_isa("UNIVERSAL")
130 constant->import( OLD_MRO => 0 );
131 *DBIx::Class::_Util::get_real_pkg_gen = \&mro::get_pkg_gen;
134 # Both of these are no longer used for anything. However bring
135 # them back after they were purged in 08a8d8f1, as there appear
136 # to be outfits with *COPY PASTED* pieces of lib/DBIx/Class/Storage/*
137 # in their production codebases. There is no point in breaking these
138 # if whatever they used actually continues to work
143 my $cluck = "The @{[ (caller(1))[3] ]} constant is no more - adjust your code" . Carp::longmess();
145 warn $cluck unless $warned->{$cluck}++;
149 sub DBICTEST () { &$sigh }
150 sub PEEPEENESS () { &$sigh }
153 use constant SPURIOUS_VERSION_CHECK_WARNINGS => ( DBIx::Class::_ENV_::PERL_VERSION < 5.010 ? 1 : 0);
155 # FIXME - this is not supposed to be here
156 # Carp::Skip to the rescue soon
157 use DBIx::Class::Carp '^DBIx::Class|^DBICTest';
161 use Storable 'nfreeze';
162 use Scalar::Util qw(weaken blessed reftype refaddr);
163 use Sub::Quote qw(qsub);
167 # Already correctly prototyped: perlbrew exec perl -MStorable -e 'warn prototype \&Storable::dclone'
168 BEGIN { *deep_clone = \&Storable::dclone }
172 sigwarn_silencer modver_gt_or_eq modver_gt_or_eq_and_lt
173 fail_on_internal_wantarray fail_on_internal_call
174 refdesc refcount hrefaddr set_subname describe_class_methods
175 scope_guard detected_reinvoked_destructor
177 is_exception dbic_internal_try visit_namespaces
178 quote_sub qsub perlstring serialize deep_clone dump_value uniq
180 UNRESOLVABLE_CONDITION
183 use constant UNRESOLVABLE_CONDITION => \ '1 = 0';
185 # Override forcing no_defer, and adding naming consistency checks
186 our %refs_closed_over_by_quote_sub_installed_crefs;
188 Carp::confess( "Anonymous quoting not supported by the DBIC quote_sub override - supply a sub name" ) if
196 Carp::confess( "The DBIC quote_sub override expects sub name '$_[0]' to be fully qualified" )
197 unless (my $stash) = $_[0] =~ /^(.+)::/;
200 "The DBIC sub_quote override does not support 'no_install'"
208 'The DBIC quote_sub override expects the namespace-part of sub name '
209 . "'$_[0]' to match the supplied package argument '$_[3]->{package}'"
213 defined $_[3]->{package}
215 $stash ne $_[3]->{package}
218 my @caller = caller(0);
220 package => $caller[0],
222 warning_bits => $caller[9],
223 hintshash => $caller[10],
226 # explicitly forced for everything
231 # just use a growing counter, no need to perform neither compaction
232 # nor any special ithread-level handling
233 $refs_closed_over_by_quote_sub_installed_crefs
234 { scalar keys %refs_closed_over_by_quote_sub_installed_crefs }
240 ! DBIx::Class::_ENV_::BROKEN_WEAK_SCALARREF_VALUES
244 } values %{ $_[2] || {} };
246 Sub::Quote::quote_sub( $_[0], $_[1], $_[2]||{}, $sq_opts );
249 sub sigwarn_silencer ($) {
252 croak "Expecting a regexp" if ref $pattern ne 'Regexp';
254 my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) };
256 return sub { &$orig_sig_warn unless $_[0] =~ $pattern };
259 sub perlstring ($) { q{"}. quotemeta( shift ). q{"} };
261 sub hrefaddr ($) { sprintf '0x%x', &refaddr||0 }
264 croak "Expecting a reference" if ! length ref $_[0];
266 # be careful not to trigger stringification,
267 # reuse @_ as a scratch-pad
268 sprintf '%s%s(0x%x)',
269 ( defined( $_[1] = blessed $_[0]) ? "$_[1]=" : '' ),
276 croak "Expecting a reference" if ! length ref $_[0];
278 # No tempvars - must operate on $_[0], otherwise the pad
279 # will count as an extra ref
280 B::svref_2object($_[0])->REFCNT;
283 sub visit_namespaces {
284 my $args = { (ref $_[0]) ? %{$_[0]} : @_ };
286 my $visited_count = 1;
288 # A package and a namespace are subtly different things
289 $args->{package} ||= 'main';
290 $args->{package} = 'main' if $args->{package} =~ /^ :: (?: main )? $/x;
291 $args->{package} =~ s/^:://;
293 if ( $args->{action}->($args->{package}) ) {
295 ( ($args->{package} eq 'main') ? '' : $args->{package} )
300 $visited_count += visit_namespaces( %$args, package => $_ ) for
302 # this happens sometimes on %:: traversal
305 { $_ =~ /^(.+?)::$/ ? "$ns$1" : () }
306 do { no strict 'refs'; keys %$ns }
313 # FIXME In another life switch this to a polyfill like the one in namespace::clean
314 sub set_subname ($$) {
317 splice @_, 0, 1, caller(0) . "::$_[0]"
324 local $Storable::canonical = 1;
329 my( %seen, $seen_undef, $numeric_preserving_copy );
332 ? $seen{ $numeric_preserving_copy = $_ }++
339 local $Data::Dumper::Indent = 1
340 unless defined $Data::Dumper::Indent;
346 require Data::Dumper;
347 my $d = Data::Dumper->new([])
360 $d->Sparseseen(1) if modver_gt_or_eq (
361 'Data::Dumper', '2.136'
366 )->Values([$_[0]])->Dump;
368 $dd_obj->Reset->Values([]);
374 ### This is *NOT* boolean.pm - deliberately not using a singleton
377 package # hide from pause
378 DBIx::Class::_Util::_Bool;
380 bool => sub { ${$_[0]} },
384 sub true () { my $x = 1; bless \$x, "DBIx::Class::_Util::_Bool" }
385 sub false () { my $x = 0; bless \$x, "DBIx::Class::_Util::_Bool" }
387 sub scope_guard (&) {
388 croak 'Calling scope_guard() in void context makes no sense'
389 if ! defined wantarray;
391 # no direct blessing of coderefs - DESTROY is buggy on those
392 bless [ $_[0] ], 'DBIx::Class::_Util::ScopeGuard';
396 DBIx::Class::_Util::ScopeGuard;
399 &DBIx::Class::_Util::detected_reinvoked_destructor;
401 local $@ if DBIx::Class::_ENV_::UNSTABLE_DOLLARAT;
409 "Execution of scope guard $_[0] resulted in the non-trappable exception:\n\n$@"
415 sub is_exception ($) {
419 # this is not strictly correct - an eval setting $@ to undef
420 # is *not* the same as an eval setting $@ to ''
421 # but for the sake of simplicity assume the following for
423 return 0 unless defined $e;
425 my ($not_blank, $suberror);
427 local $SIG{__DIE__} if $SIG{__DIE__};
430 # The ne() here is deliberate - a plain length($e), or worse "$e" ne
431 # will entirely obviate the need for the encolsing eval{}, as the
432 # condition we guard against is a missing fallback overload
433 $not_blank = ( $e ne '' );
438 if (defined $suberror) {
439 if (length (my $class = blessed($e) )) {
440 carp_unique( sprintf(
441 'External exception class %s implements partial (broken) overloading '
442 . 'preventing its instances from being used in simple ($x eq $y) '
443 . 'comparisons. Given Perl\'s "globally cooperative" exception '
444 . 'handling this type of brokenness is extremely dangerous on '
445 . 'exception objects, as it may (and often does) result in silent '
446 . '"exception substitution". DBIx::Class tries to work around this '
447 . 'as much as possible, but other parts of your software stack may '
448 . 'not be even aware of this. Please submit a bugreport against the '
449 . 'distribution containing %s and in the meantime apply a fix similar '
450 . 'to the one shown at %s, in order to ensure your exception handling '
451 . 'is saner application-wide. What follows is the actual error text '
452 . "as generated by Perl itself:\n\n%s\n ",
455 'http://v.gd/DBIC_overload_tempfix/',
459 # workaround, keeps spice flowing
460 $not_blank = !!( length $e );
463 # not blessed yet failed the 'ne'... this makes 0 sense...
469 # a ref evaluating to '' is definitively a "null object"
472 length( my $class = ref $e )
474 carp_unique( sprintf(
475 "Objects of external exception class '%s' stringify to '' (the "
476 . 'empty string), implementing the so called null-object-pattern. '
477 . 'Given Perl\'s "globally cooperative" exception handling using this '
478 . 'class of exceptions is extremely dangerous, as it may (and often '
479 . 'does) result in silent discarding of errors. DBIx::Class tries to '
480 . 'work around this as much as possible, but other parts of your '
481 . 'software stack may not be even aware of the problem. Please submit '
482 . 'a bugreport against the distribution containing %s',
496 # Recreate the logic of try(), while reusing the catch()/finally() as-is
498 # FIXME: We need to move away from Try::Tiny entirely (way too heavy and
499 # yes, shows up ON TOP of profiles) but this is a batle for another maint
500 sub dbic_internal_try (&;@) {
502 my $try_cref = shift;
503 my $catch_cref = undef; # apparently this is a thing... https://rt.perl.org/Public/Bug/Display.html?id=119311
507 if( ref($arg) eq 'Try::Tiny::Catch' ) {
509 croak 'dbic_internal_try() may not be followed by multiple catch() blocks'
514 elsif ( ref($arg) eq 'Try::Tiny::Finally' ) {
515 croak 'dbic_internal_try() does not support finally{}';
519 'dbic_internal_try() encountered an unexpected argument '
520 . "'@{[ defined $arg ? $arg : 'UNDEF' ]}' - perhaps "
521 . 'a missing semi-colon before or ' # trailing space important
526 my $wantarray = wantarray;
527 my $preexisting_exception = $@;
530 my $all_good = eval {
531 $@ = $preexisting_exception;
533 local $callstack_state->{in_internal_try} = 1
534 unless $callstack_state->{in_internal_try};
536 # always unset - someone may have snuck it in
537 local $SIG{__DIE__} if $SIG{__DIE__};
540 @ret = $try_cref->();
542 elsif( defined $wantarray ) {
543 $ret[0] = $try_cref->();
553 $@ = $preexisting_exception;
556 return $wantarray ? @ret : $ret[0]
558 elsif ( $catch_cref ) {
560 return $catch_cref->($exception);
567 sub in_internal_try { !! $callstack_state->{in_internal_try} }
571 my $destruction_registry = {};
573 sub DBIx::Class::__Util_iThreads_handler__::CLONE {
574 %$destruction_registry = map {
576 ? ( refaddr($_) => $_ )
578 } values %$destruction_registry;
580 weaken($_) for values %$destruction_registry;
582 # Dummy NEXTSTATE ensuring the all temporaries on the stack are garbage
583 # collected before leaving this scope. Depending on the code above, this
584 # may very well be just a preventive measure guarding future modifications
588 # This is almost invariably invoked from within DESTROY
589 # throwing exceptions won't work
590 sub detected_reinvoked_destructor {
592 # quick "garbage collection" pass - prevents the registry
593 # from slowly growing with a bunch of undef-valued keys
594 defined $destruction_registry->{$_} or delete $destruction_registry->{$_}
595 for keys %$destruction_registry;
597 if (! length ref $_[0]) {
598 printf STDERR '%s() expects a blessed reference %s',
602 return undef; # don't know wtf to do
604 elsif (! defined $destruction_registry->{ my $addr = refaddr($_[0]) } ) {
605 weaken( $destruction_registry->{$addr} = $_[0] );
609 carp_unique ( sprintf (
610 'Preventing *MULTIPLE* DESTROY() invocations on %s - an *EXTREMELY '
611 . 'DANGEROUS* condition which is *ALMOST CERTAINLY GLOBAL* within your '
612 . 'application, affecting *ALL* classes without active protection against '
613 . 'this. Diagnose and fix the root cause ASAP!!!%s',
615 ( ( $INC{'Devel/StackTrace.pm'} and ! do { local $@; eval { Devel::StackTrace->VERSION(2) } } )
616 ? " (likely culprit Devel::StackTrace\@@{[ Devel::StackTrace->VERSION ]} found in %INC, http://is.gd/D_ST_refcap)"
626 my $module_name_rx = qr/ \A [A-Z_a-z] [0-9A-Z_a-z]* (?: :: [0-9A-Z_a-z]+ )* \z /x;
627 my $ver_rx = qr/ \A [0-9]+ (?: \. [0-9]+ )* (?: \_ [0-9]+ )* \z /x;
629 sub modver_gt_or_eq ($$) {
630 my ($mod, $ver) = @_;
632 croak "Nonsensical module name supplied"
633 if ! defined $mod or $mod !~ $module_name_rx;
635 croak "Nonsensical minimum version supplied"
636 if ! defined $ver or $ver !~ $ver_rx;
639 my $ver_cache = ${"${mod}::__DBIC_MODULE_VERSION_CHECKS__"} ||= ( $mod->VERSION
641 : croak "$mod does not seem to provide a version (perhaps it never loaded)"
644 ! defined $ver_cache->{$ver}
646 $ver_cache->{$ver} = do {
648 local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ )
649 if SPURIOUS_VERSION_CHECK_WARNINGS;
651 local $SIG{__DIE__} if $SIG{__DIE__};
653 eval { $mod->VERSION($ver) } ? 1 : 0;
659 sub modver_gt_or_eq_and_lt ($$$) {
660 my ($mod, $v_ge, $v_lt) = @_;
662 croak "Nonsensical maximum version supplied"
663 if ! defined $v_lt or $v_lt !~ $ver_rx;
666 modver_gt_or_eq($mod, $v_ge)
668 ! modver_gt_or_eq($mod, $v_lt)
673 # FIXME - should be a private my(), but I'm too uncertain whether
674 # all bases are covered
675 our $describe_class_query_cache;
677 sub describe_class_methods {
679 ref $_[0] eq 'HASH' ? $_[0]
680 : ( @_ == 1 and ! length ref $_[0] ) ? { class => $_[0] }
684 my ($class, $requested_mro) = @{$args}{qw( class use_mro )};
686 croak "Expecting a class name either as the sole argument or a 'class' option"
687 if not defined $class or $class !~ $module_name_rx;
689 $requested_mro ||= mro::get_mro($class);
691 # mro::set_mro() does not bump pkg_gen - WHAT THE FUCK?!
692 my $query_cache_key = "$class|$requested_mro";
694 my $stack_cache_key =
695 ( mro::get_mro($class) eq $requested_mro )
700 # use a cache on old MRO, since while we are recursing in this function
701 # nothing can possibly change (the speedup is immense)
702 # (yes, people could be tie()ing the stash and adding methods on access
703 # but there is a limit to how much crazy can be supported here)
705 # we use the cache for linear_isa lookups on new MRO as well - it adds
706 # a *tiny* speedup, and simplifies the code a lot
708 local $mro_recursor_stack->{cache} = {}
709 unless $mro_recursor_stack->{cache};
713 $my_gen += get_real_pkg_gen($_) for ( my @full_ISA = (
716 $mro_recursor_stack->{cache}{$stack_cache_key}{linear_isa}
718 mro::get_linear_isa($class, $requested_mro)
722 $mro_recursor_stack->{cache}{$class}{is_universal}
724 mro::is_universal($class)
726 $mro_recursor_stack->{cache}{UNIVERSAL}{linear_isa}
728 mro::get_linear_isa("UNIVERSAL")
733 my $slot = $describe_class_query_cache->{$query_cache_key} ||= {};
735 unless ( ($slot->{cumulative_gen}||0) == $my_gen ) {
737 # remove ourselves from ISA
744 @{ $mro_recursor_stack->{cache}{$stack_cache_key}{linear_isa} }
745 [ 1 .. $#{$mro_recursor_stack->{cache}{$stack_cache_key}{linear_isa}} ]
748 type => $requested_mro,
749 is_c3 => ( ($requested_mro eq 'c3') ? 1 : 0 ),
751 cumulative_gen => $my_gen,
754 # ensure the cache is populated for the parents, code below can then
755 # efficiently operate over the query_cache directly
756 describe_class_methods($_) for reverse @full_ISA;
760 # combine full ISA-order inherited and local method list into a
764 unshift @{ $slot->{methods}{$_->{name}} }, $_
769 $_->{via_class} ne $class
771 $slot->{methods_defined_in_class}{$_->{name}} = $_
776 @{ $slot->{methods}{$_->{name}} } > 1
780 $slot->{methods_with_supers}{$_->{name}} = $slot->{methods}{$_->{name}}
784 # what describe_class_methods for @full_ISA produced above
786 $describe_class_query_cache->{$_}{methods_defined_in_class} || {}
787 } } map { "$_|" . mro::get_mro($_) } reverse @full_ISA ),
789 # our own non-cleaned subs + their attributes
792 # need to account for dummy helper crefs under OLD_MRO
794 ! DBIx::Class::_ENV_::OLD_MRO
796 ! ( ( $Class::C3::MRO{$class} || {} )->{methods}{$_} )
799 # these 2 OR-ed checks are sufficient for 5.10+
801 ref(\ "${class}::"->{$_} ) ne 'GLOB'
803 defined( *{ "${class}::"->{$_} }{CODE} )
809 map { $_ => 1 } attributes::get( \&{"${class}::${_}"} )
813 } keys %{"${class}::"} )
817 # recalculate the pkg_gen on newer perls under Taint mode,
818 # because of shit like:
819 # perl -T -Mmro -e 'package Foo; sub bar {}; defined( *{ "Foo::"->{bar}}{CODE} ) and warn mro::get_pkg_gen("Foo") for (1,2,3)'
822 ! DBIx::Class::_ENV_::OLD_MRO
827 $slot->{cumulative_gen} = 0;
828 $slot->{cumulative_gen} += get_real_pkg_gen($_)
829 for $class, @full_ISA;
840 # Why not just use some higher-level module or at least File::Spec here?
842 # 1) This is a *very* rarely used function, and the deptree is large
843 # enough already as it is
845 # 2) (more importantly) Our tooling is utter shit in this area. There
846 # is no comprehensive support for UNC paths in PathTools and there
847 # are also various small bugs in representation across different
848 # path-manipulation CPAN offerings.
850 # Since this routine is strictly used for logical path processing (it
851 # *must* be able to work with not-yet-existing paths), use this seemingly
852 # simple but I *think* complete implementation to feed to other consumers
854 # If bugs are ever uncovered in this routine, *YOU ARE URGED TO RESIST*
855 # the impulse to bring in an external dependency. During runtime there
856 # is exactly one spot that could potentially maybe once in a blue moon
857 # use this function. Keep it lean.
860 ( $_[0] =~ m{ [\/\\] ( \.{0,2} ) ( [\/\\]* ) \z }x )
864 ( ( length($1) and ! length($2) ) ? '/' : '' )
871 File::Spec->catpath (
872 ( File::Spec->splitpath( "$_[0]" ) )[0,1],
881 # do not ask for a recent version, use 1.x API calls
882 File::Path::mkpath([ "$_[0]" ]); # File::Path does not like objects
887 my $list_ctx_ok_stack_marker;
889 sub fail_on_internal_wantarray () {
890 return if $list_ctx_ok_stack_marker;
892 if (! defined wantarray) {
893 croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard');
897 while ( ( (CORE::caller($cf+1))[3] || '' ) =~ / :: (?:
899 # these are public API parts that alter behavior on wantarray
900 search | search_related | slice | search_literal
904 # these are explicitly prefixed, since we only recognize them as valid
905 # escapes when they come from the guts of CDBICompat
906 CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all )
912 my ($fr, $want, $argdesc);
915 $fr = [ CORE::caller($cf) ];
916 $want = ( CORE::caller($cf-1) )[5];
917 $argdesc = ref $DB::args[0]
918 ? DBIx::Class::_Util::refdesc($DB::args[0])
924 $want and $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/
926 DBIx::Class::Exception->throw( sprintf (
927 "Improper use of %s instance in list context at %s line %d\n\n Stacktrace starts",
928 $argdesc, @{$fr}[1,2]
929 ), 'with_stacktrace');
932 weaken( $list_ctx_ok_stack_marker = my $mark = [] );
938 sub fail_on_internal_call {
942 $fr = [ CORE::caller(1) ];
943 $argdesc = ref $DB::args[0]
944 ? DBIx::Class::_Util::refdesc($DB::args[0])
945 : ( $DB::args[0] . '' )
950 # need to make allowance for a proxy-yet-direct call
952 $fr->[0] eq 'DBIx::Class::ResultSourceProxy'
954 @fr2 = (CORE::caller(2))
957 ( $fr->[3] =~ /([^:])+$/ )[0]
959 ( $fr2[3] =~ /([^:])+$/ )[0]
969 $check_fr->[0] =~ /^(?:DBIx::Class|DBICx::)/
971 $check_fr->[1] !~ /\b(?:CDBICompat|ResultSetProxy)\b/ # no point touching there
973 DBIx::Class::Exception->throw( sprintf (
974 "Illegal internal call of indirect proxy-method %s() with argument '%s': examine the last lines of the proxy method deparse below to determine what to call directly instead at %s on line %d\n\n%s\n\n Stacktrace starts",
975 $fr->[3], $argdesc, @{$fr}[1,2], ( $fr->[6] || do {
978 B::Deparse->new->coderef2text(\&{$fr->[3]})
980 ), 'with_stacktrace');