4 # various typeglob tests
17 # type coercion on assignment
21 is(ref(\$bar), 'SCALAR');
24 # type coercion (not) on misc ops
27 is(ref(\$foo), 'GLOB');
29 unlike ($foo, qr/abcd/);
30 is(ref(\$foo), 'GLOB');
32 is($foo, '*main::bar');
33 is(ref(\$foo), 'GLOB');
38 is(ref(\$foo), 'GLOB', 'no type coercion when assigning to *{} retval');
41 \$::{phake}, \*{"phake"},
42 'symbolic *{} returns symtab entry when FAKE'
44 ${\*{"phake"}} = undef;
46 ref(\$::{phake}), 'GLOB',
47 'no type coercion when assigning to retval of symbolic *{}'
52 \$::{phaque}, \*phaque,
53 "compile-time *{} returns symtab entry when FAKE"
58 ref(\$::{phaque}), 'GLOB',
59 'no type coercion when assigning to retval of compile-time *{}'
63 # type coercion on substitutions that match
72 # typeglobs as lvalues
73 substr($foo, 0, 1) = "XXX";
74 is(ref(\$foo), 'SCALAR');
75 is($foo, 'XXXmain::bar');
77 # returning glob values
79 local($bar) = *main::foo;
86 is(ref(\$fuu), 'GLOB');
90 is(ref(\$baa), 'GLOB');
92 # nested package globs
93 # NOTE: It's probably OK if these semantics change, because the
94 # fact that %X::Y:: is stored in %X:: isn't documented.
97 { package Foo::Bar; no warnings 'once'; $test=1; }
98 ok(exists $Foo::{'Bar::'});
99 is($Foo::{'Bar::'}, '*Foo::Bar::');
102 # test undef operator clearing out entire glob
104 @foo = qw(more stuff);
105 %foo = qw(even more random stuff);
112 # test warnings from assignment of undef to glob
114 local $SIG{__WARN__} = sub { $msg = $_[0] };
119 like($msg, qr/Undefined value assigned to typeglob/);
122 # test warnings for converting globs to other forms
124 foreach ($copy, *SKREEE) {
126 my $victim = sprintf "%d", $_;
127 like($msg, qr/Argument "\*main::[A-Z]{6}" isn't numeric in sprintf/,
128 "Warning on conversion to IV");
132 $victim = sprintf "%u", $_;
133 like($msg, qr/Argument "\*main::[A-Z]{6}" isn't numeric in sprintf/,
134 "Warning on conversion to UV");
138 $victim = sprintf "%e", $_;
139 like($msg, qr/Argument "\*main::[A-Z]{6}" isn't numeric in sprintf/,
140 "Warning on conversion to NV");
141 like($victim, qr/^0\.0+E\+?00/i, "Expect floating point zero");
144 $victim = sprintf "%s", $_;
145 is($msg, '', "No warning on stringification");
146 is($victim, '' . $_);
150 my $test = curr_test();
151 # test *glob{THING} syntax
156 %x = ("ok $test" => "\n");
158 sub x { "ok $test\n" }
159 print ${*x{SCALAR}}, @{*x{ARRAY}}, %{*x{HASH}}, &{*x{CODE}};
160 # This needs to go here, after the print, as sub x will return the current
164 XXX This text isn't used. Should it be?
168 is (ref *x{FORMAT}, "FORMAT");
169 is ("@{sub { *_{ARRAY} }->(1..3)}", "1 2 3",
170 'returning *_{ARRAY} from sub');
172 is (*{*x{GLOB}}, "*main::STDOUT");
175 my $test = curr_test();
177 print {*x{IO}} "ok $test\n";
181 local $SIG{__WARN__} = sub {
184 my $val = *x{FILEHANDLE};
185 print {*x{IO}} ($warn =~ /is deprecated/
186 ? "ok $test\n" : "not ok $test\n");
190 is *x{NAME}, 'x', '*foo{NAME}';
191 is *x{PACKAGE}, 'main', '*foo{PACKAGE}';
192 { no warnings 'once'; *x = *Foo::y; }
193 is *x, '*Foo::y', 'glob stringifies as assignee after glob-to-glob assign';
194 is *x{NAME}, 'x', 'but *foo{NAME} still returns the original name';
195 is *x{PACKAGE}, 'main', 'and *foo{PACKAGE} the original package';
198 # test if defined() doesn't create any new symbols
210 *{$a} = sub { $state = "ok" };
218 # although it *should* if you're talking about magicals
235 "o" =~ /(((((((((((o)))))))))))/;
240 # [ID 20010526.001] localized glob loses value when assigned to
242 $j=1; %j=(a=>1); @j=(1); local *j=*j; *j = sub{};
249 # does pp_readline() handle glob-ness correctly?
257 local $SIG{__WARN__} = sub { $w = $_[0] };
259 local *abc1 = sub { };
267 like ($w, qr/Prototype mismatch/);
271 # [17375] rcatline to formerly-defined undef was broken. Fixed in
272 # do_readline by checking SvOK. AMS, 20020918
280 # test the assignment of a GLOB to an LVALUE
282 local $SIG{__DIE__} = sub { $e = $_[0] };
284 sub f { $_[0] = 0; $_[0] = "a"; $_[0] = *DATA }
286 is ($v{v}, '*main::DATA');
287 is (ref\$v{v}, 'GLOB', 'lvalue assignment preserves globs');
288 my $x = readline $v{v};
290 is ($e, '', '__DIE__ handler never called');
295 # GLOB assignment to tied element
296 local $SIG{__DIE__} = sub { $e = $_[0] };
297 sub T::TIEARRAY { bless [] => "T" }
298 sub T::STORE { $_[0]->[ $_[1] ] = $_[2] }
299 sub T::FETCH { $_[0]->[ $_[1] ] }
300 sub T::FETCHSIZE { @{$_[0]} }
303 is ($ary[0], '*main::DATA');
305 ref\tied(@ary)->[0], 'GLOB',
306 'tied elem assignment preserves globs'
308 is ($e, '', '__DIE__ handler not called');
309 my $x = readline $ary[0];
311 is ($e, '', '__DIE__ handler never called');
315 # Need some sort of die or warn to get the global destruction text if the
316 # bug is still present
317 my $output = runperl(prog => <<'EOPROG');
320 sub DESTROY {eval {die qq{Farewell $_[0]}}; print $@}
326 like($output, qr/^Farewell M=SCALAR/, "DESTROY was called");
327 unlike($output, qr/global destruction/,
328 "unreferenced symbol tables should be cleaned up immediately");
331 # Possibly not the correct test file for these tests.
332 # There are certain space optimisations implemented via promotion rules to
335 foreach (qw (oonk ga_shloip)) {
336 ok(!exists $::{$_}, "no symbols of any sort to start with for $_");
339 # A string in place of the typeglob is promoted to the function prototype
341 my $proto = eval 'prototype \&oonk';
343 is ($proto, "pie", "String is promoted to prototype");
346 # A reference to a value is used to generate a constant subroutine
347 foreach my $value (3, "Perl rules", \42, qr/whatever/, [1,2,3], {1=>2},
348 \*STDIN, \&ok, \undef, *STDOUT) {
351 $proto = eval 'prototype \&oonk';
353 is ($proto, '', "Prototype for a constant subroutine is empty");
355 my $got = eval 'oonk';
357 is (ref $got, ref $value, "Correct type of value (" . ref($value) . ")");
358 is ($got, $value, "Value is correctly set");
362 $::{oonk} = \"Value";
364 *{"ga_shloip"} = \&{"oonk"};
366 is (ref $::{ga_shloip}, 'SCALAR', "Export of proxy constant as is");
367 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
368 is (eval 'ga_shloip', "Value", "Constant has correct value");
369 is (ref $::{ga_shloip}, 'SCALAR',
370 "Inlining of constant doesn't change representation");
372 delete $::{ga_shloip};
374 eval 'sub ga_shloip (); 1' or die $@;
375 is ($::{ga_shloip}, '', "Prototype is stored as an empty string");
377 # Check that a prototype expands.
378 *{"ga_shloip"} = \&{"oonk"};
380 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
381 is (eval 'ga_shloip', "Value", "Constant has correct value");
382 is (ref \$::{ga_shloip}, 'GLOB', "Symbol table has full typeglob");
387 # Check that assignment to an existing typeglob works
390 local $SIG{__WARN__} = sub { $w = $_[0] };
391 *{"zwot"} = \&{"oonk"};
392 is($w, '', "Should be no warning");
395 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
396 is (eval 'zwot', "Value", "Constant has correct value");
397 is (ref \$::{zwot}, 'GLOB', "Symbol table has full typeglob");
398 is (join ('!', @::zwot), 'Zwot!', "Existing array still in typeglob");
404 # Check that assignment to an existing subroutine works
407 local $SIG{__WARN__} = sub { $w = $_[0] };
408 *{"spritsits"} = \&{"oonk"};
409 like($w, qr/^Constant subroutine main::spritsits redefined/,
410 "Redefining a constant sub should warn");
413 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
414 is (eval 'spritsits', "Value", "Constant has correct value");
415 is (ref \$::{spritsits}, 'GLOB', "Symbol table has full typeglob");
417 # Check that assignment to an existing typeglob works
420 local $SIG{__WARN__} = sub { $w = $_[0] };
422 *{"plunk"} = \&{"oonk"};
423 is($w, '', "Should be no warning");
426 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
427 is (eval 'plunk', "Value", "Constant has correct value");
428 is (ref \$::{plunk}, 'GLOB', "Symbol table has full typeglob");
430 my $gr = eval '\*plunk' or die;
434 local $SIG{__WARN__} = sub { $w = $_[0] };
436 is($w, '', "Redefining a constant sub to another constant sub with the same underlying value should not warn (It's just re-exporting, and that was always legal)");
439 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
440 is (eval 'plunk', "Value", "Constant has correct value");
441 is (ref \$::{plunk}, 'GLOB', "Symbol table has full typeglob");
443 # Non-void context should defeat the optimisation, and will cause the original
444 # to be promoted (what change 26482 intended)
448 local $SIG{__WARN__} = sub { $w = $_[0] };
449 $result = *{"awkkkkkk"} = \&{"oonk"};
450 is($w, '', "Should be no warning");
453 is (ref \$result, 'GLOB',
454 "Non void assignment should still return a typeglob");
456 is (ref \$::{oonk}, 'GLOB', "This export does affect original");
457 is (eval 'plunk', "Value", "Constant has correct value");
458 is (ref \$::{plunk}, 'GLOB', "Symbol table has full typeglob");
461 $::{oonk} = \"Value";
465 local $SIG{__WARN__} = sub { $w = $_[0] };
466 *{"zap"} = \&{"oonk"};
467 is($w, '', "Should be no warning");
471 is (ref $::{oonk}, 'SCALAR', "Export doesn't affect original");
472 is (eval 'zap', "Value", "Constant has correct value");
473 is (ref $::{zap}, 'SCALAR', "Exported target is also a PCS");
476 local $SIG{__WARN__} = sub { die $_[0] };
477 *{"biff"} = \&{"oonk"};
481 is (ref \$::{oonk}, 'GLOB', "This export does affect original");
482 is (eval 'biff', "Value", "Constant has correct value");
483 is (ref \$::{biff}, 'GLOB', "Symbol table has full typeglob");
485 $::{yarrow} = [4,5,6];
486 is join("-", eval "yarrow()"), '4-5-6', 'array ref as stash elem';
487 is ref $::{yarrow}, "ARRAY", 'stash elem is still array ref after use';
488 is join("-", eval "&yarrow"), '4-5-6', 'calling const list with &';
489 is join("-", eval "&yarrow(1..10)"), '4-5-6', 'const list ignores & args';
490 is prototype "yarrow", "", 'const list has "" prototype';
491 is eval "yarrow", 3, 'const list in scalar cx returns length';
494 eval 'borage("sub ref in stash")' or fail "sub ref in stash";
497 use vars qw($glook $smek $foof);
498 # Check reference assignment isn't affected by the SV type (bug #38439)
501 $foof = "halt and cool down";
510 is($foof, "halt and cool down");
518 foreach my $value ({1=>2}, *STDOUT{IO}, *STDOUT{FORMAT}) {
519 # *STDOUT{IO} returns a reference to a PVIO. As it's blessed, ref returns
520 # IO::Handle, which isn't what we want.
526 $proto = eval 'prototype \&oonk';
527 like ($@, qr/^Cannot convert a reference to $type to typeglob/,
528 "Cannot upgrade ref-to-$type to typeglob");
532 no warnings qw(once uninitialized);
534 my $r = eval {no strict; ${*{$g}{SCALAR}}};
535 is ($@, '', "PERL_DONT_CREATE_GVSV shouldn't affect thingy syntax");
538 $r = eval {use strict; ${*{$g}{SCALAR}}};
540 "PERL_DONT_CREATE_GVSV shouldn't affect thingy syntax under strict");
544 # Bug reported by broquaint on IRC
545 *slosh::{HASH}->{ISA}=[];
547 pass("gv_fetchmeth coped with the unexpected");
549 # An audit found these:
558 like ($@, qr/^Can't locate object method "rip"/, "Even with SUPER");
560 is(slosh->isa('swoosh'), '');
562 $CORE::GLOBAL::{"lock"}=[];
563 eval "no warnings; lock";
564 like($@, qr/^Not enough arguments for lock/,
565 "Can't trip up general keyword overloading");
567 $CORE::GLOBAL::{"readline"}=[];
568 eval "<STDOUT> if 0";
569 is($@, '', "Can't trip up readline overloading");
571 $CORE::GLOBAL::{"readpipe"}=[];
573 is($@, '', "Can't trip up readpipe overloading");
577 die if exists $::{BONK};
578 $::{BONK} = \"powie";
579 *{"BONK"} = \&{"BONK"};
580 eval 'is(BONK(), "powie",
581 "Assignment works when glob created midway (bug 45607)"); 1'
585 # For now these tests are here, but they would probably be better in a file for
586 # tests for croaks. (And in turn, that probably deserves to be in a different
587 # directory. Gerard Goossen has a point about the layout being unclear
590 no warnings 'numeric';
594 no warnings 'numeric';
601 foreach my $type (qw(integer number string)) {
602 my $prog = "coerce_$type(*STDERR)";
603 is (scalar eval "$prog; 1", undef, "$prog failed...");
604 like ($@, qr/Can't coerce GLOB to $type in/,
605 "with the correct error message");
608 # RT #65582 anonymous glob should be defined, and not coredump when
609 # stringified. The behaviours are:
611 # defined($glob) "$glob" $glob .= ...
612 # 5.8.8 false "" with uninit warning "" with uninit warning
613 # 5.10.0 true (coredump) (coredump)
614 # 5.1[24] true "" "" with uninit warning
615 # 5.16 true "*__ANON__::..." "*__ANON__::..."
618 my $io_ref = *STDOUT{IO};
620 ok(defined $glob, "RT #65582 anon glob should be defined");
623 local $SIG{__WARN__} = sub { $warn = $_[0] };
626 is($warn, '', "RT #65582 anon glob stringification shouldn't warn");
627 is($str, '*__ANON__::__ANONIO__',
628 "RT #65582/#96326 anon glob stringification");
631 # Another stringification bug: Test that recursion does not cause lexical
632 # handles to lose their names.
635 @output = r($_[0]-1) if $_[0];
642 '*main::$fh *main::$fh *main::$fh *main::$fh *main::$fh',
643 'recursion does not cause lex handles to lose their names';
645 # And sub cloning, too; not just recursion
650 @output = CORE::__SUB__->($_[0]-1) if $_[0];
656 '*main::$fh *main::$fh *main::$fh *main::$fh *main::$fh',
657 'sub cloning does not cause lex handles to lose their names';
659 # [perl #71254] - Assigning a glob to a variable that has a current
660 # match position. (We are testing that Perl_magic_setmglob respects globs'
661 # special used of SvSCREAM.)
663 $m = 2; $m=~s/./0/gems; $m= *STDERR;
665 "$m", "*main::STDERR",
666 '[perl #71254] assignment of globs to vars with pos'
670 # [perl #72740] - indirect object syntax, heuristically imputed due to
671 # the non-existence of a function, should not cause a stash entry to be
672 # created for the non-existent function.
675 my $f = bless({}, RT72740b);
682 sub s2 { "RT72740b::s2" }
683 sub s4 { "RT72740b::s4" }
685 ok(exists($RT72740a::{s1}), "RT72740a::s1 exists");
686 ok(!exists($RT72740a::{s2}), "RT72740a::s2 does not exist");
687 ok(exists($RT72740a::{s3}), "RT72740a::s3 exists");
688 ok(exists($RT72740a::{s4}), "RT72740a::s4 exists");
689 is(RT72740a::s1(), "RT72740b::s2", "RT72740::s1 parsed correctly");
690 is(RT72740a::s3(), "RT72740b::s4", "RT72740::s3 parsed correctly");
692 # [perl #71686] Globs that are in symbol table can be un-globbed
695 is (eval 'local *::fake = \"chuck"; $fake', 'chuck',
696 "Localized glob didn't coerce into a RV");
697 is ($@, '', "Can localize FAKE glob that's present in stash");
698 is (scalar $::{fake}, "*main::sym",
699 "Localized FAKE glob's value was correctly restored");
701 # [perl #1804] *$x assignment when $x is a copy of another glob
702 # And [perl #77508] (same thing with list assignment)
705 my $x = *_random::glob_that_is_not_used_elsewhere;
708 "$x", '*_random::glob_that_is_not_used_elsewhere',
709 '[perl #1804] *$x assignment when $x is FAKE',
711 $x = *_random::glob_that_is_not_used_elsewhere;
712 (my $dummy, *$x) = (undef,[]);
714 "$x", '*_random::glob_that_is_not_used_elsewhere',
715 '[perl #77508] *$x list assignment when $x is FAKE',
716 ) or require Devel::Peek, Devel::Peek::Dump($x);
720 # this caused panics or 'Attempt to free unreferenced scalar'
721 # (its a compile-time issue, so the die lets us skip the prints)
724 local $SIG{__WARN__} = sub { push @warnings, @_ };
727 BEGIN { $::{FOO} = \'bar' }
733 like($@, qr/made it/, "#76540 - no panic");
734 ok(!@warnings, "#76540 - no 'Attempt to free unreferenced scalar'");
737 # [perl #77362] various bugs related to globs as PVLVs
739 no warnings qw 'once void';
740 my %h; # We pass a key of this hash to the subroutine to get a PVLV.
742 # Set up our glob-as-PVLV
745 # Bad symbol for array
746 ok eval{ @$_; 1 }, 'PVLV glob slots can be autovivified' or diag $@;
748 # This should call TIEHANDLE, not TIESCALAR
749 *thext::TIEHANDLE = sub{};
750 ok eval{ tie *$_, 'thext'; 1 }, 'PVLV globs can be tied as handles'
753 # Assigning undef to the glob should not overwrite it...
756 local $SIG{__WARN__} = sub { $w = shift };
758 is $_, "*main::hon", 'PVLV: assigning undef to the glob does nothing';
759 like $w, qr\Undefined value assigned to typeglob\,
760 'PVLV: assigning undef to the glob warns';
763 # Neither should reference assignment.
765 is $_, "*main::hon", "PVLV: arrayref assignment assigns to the AV slot";
767 # Concatenation should still work.
768 ok eval { $_ .= 'thlew' }, 'PVLV concatenation does not die' or diag $@;
769 is $_, '*main::honthlew', 'PVLV concatenation works';
771 # And we should be able to overwrite it with a string, number, or refer-
772 # ence, too, if we omit the *.
773 $_ = *hon; $_ = 'tzor';
774 is $_, 'tzor', 'PVLV: assigning a string over a glob';
776 is $_, 23, 'PVLV: assigning an integer over a glob';
777 $_ = *hon; $_ = 23.23;
778 is $_, 23.23, 'PVLV: assigning a float over a glob';
779 $_ = *hon; $_ = \my $sthat;
780 is $_, \$sthat, 'PVLV: assigning a reference over a glob';
782 # This bug was found by code inspection. Could this ever happen in
784 # This duplicates a file handle, accessing it through a PVLV glob, the
785 # glob having been removed from the symbol table, so a stringified form
786 # of it does not work. This checks that sv_2io does not stringify a PVLV.
788 open *quin, "test.pl"; # test.pl is as good a file as any
790 ok eval { open my $zow, "<&", $_ }, 'PVLV: sv_2io stringifieth not'
793 # Similar tests to make sure sv_2cv etc. do not stringify.
795 ok eval { &$_ }, "PVLV glob can be called as a sub" or diag $@;
798 is eval { &$_ }, 2, 'PVLV holding a string can be called as a sub'
801 # Coderef-to-glob assignment when the glob is no longer accessible
802 # under its name: These tests are to make sure the OPpASSIGN_CV_TO_GV
803 # optimisation takes PVLVs into account, which is why the RHSs have to be
805 use constant gheen => 'quare';
809 is eval { &$_ }, 'quare',
810 'PVLV: constant assignment when the glob is detached from the symtab'
814 *gheck = sub { 'lon' };
816 is eval { &$_ }, 'lon',
817 'PVLV: coderef assignment when the glob is detached from the symtab'
821 skip_if_miniperl("no dynamic loading on miniperl, so can't load PerlIO::scalar", 1);
822 # open should accept a PVLV as its first argument
824 ok eval { open $_,'<', \my $thlext }, 'PVLV can be the first arg to open'
828 # -t should not stringify
829 $_ = *thlit; delete $::{thlit};
831 ok defined -t $_, 'PVLV: -t does not stringify';
834 # but some systems don’t support this on file handles
838 open my $quile, "<", 'test.pl';
842 } ? $pass : $@ =~ /not implemented on filehandles/,
843 "PVLV: -T does not stringify";
845 # Unopened file handle
848 local $SIG{__WARN__} = sub { $w .= shift };
851 like $w, qr\unopened filehandle vor\,
852 'PVLV globs get their names reported in unopened error messages';
859 pass('Can assign integers to typeglobs');
861 pass('Can assign floats to typeglobs');
863 pass('Can assign strings to typeglobs');
867 sub TIESCALAR{bless[]}
868 sub STORE{ die "No!"}
869 sub FETCH{ no warnings 'once'; *thrit }
871 () = "$a"; # do a fetch; now $a holds a glob
872 eval { *$a = sub{} };
876 "[perl #77812] Globs in tied scalars can be reified if STORE dies"
879 # These two crashed prior to 5.13.6. In 5.13.6 they were fatal errors. They
880 # were fixed in 5.13.7.
882 my $glob = \*heen::ISA;
883 delete $::{"heen::"};
885 }, "glob-to-*ISA assignment works when *ISA has lost its stash";
887 my $glob = \*slare::ISA;
888 delete $::{"slare::"};
890 }, "array-to-*ISA assignment works when *ISA has lost its stash";
891 # These two crashed in 5.13.6. They were likewise fixed in 5.13.7.
894 my $glob = do { no warnings "once"; \*phing::foo};
895 delete $::{"phing::"};
897 }, "Assigning a glob-with-sub to a glob that has lost its stash works";
900 my $glob = \*pon::foo;
903 }, "Assigning a glob to a glob-with-sub that has lost its stash works";
907 sub TIESCALAR{ bless \\pop }
908 sub FETCH { $${$_[0]} }
909 sub STORE { $${$_[0]} = $_[1] }
911 tie my $alias, 'Tie::Alias', my $var;
917 is $alias, 3, "[perl #77926] Glob reification during localisation";
921 # This code causes gp_free to call a destructor when a glob is being
922 # restored on scope exit. The destructor used to see SVs with a refcount of
923 # zero inside the glob, which could result in crashes (though not in this
924 # test case, which just panics).
928 *Trit::DESTROY = sub {
929 $thwext = 42; # panic
934 $thwext = bless[],'Trit';
938 'no error when gp_free calls a destructor that assigns to the gv';
941 # This is a similar test, for destructors seeing a GV without a reference
943 sub undefine_me_if_you_dare {}
944 bless \&undefine_me_if_you_dare, "Undefiner";
945 sub Undefiner::DESTROY {
946 undef *undefine_me_if_you_dare;
950 local $SIG{__WARN__} = sub { $w .= shift };
951 undef *undefine_me_if_you_dare;
953 'undeffing a gv in DESTROY triggered by undeffing the same gv'
957 # More gp_free madness. gp_free could call a destructor that frees the gv
958 # whose gp is being freed.
959 sub Fred::AUTOLOAD { $Fred::AUTOLOAD }
960 undef *{"Fred::AUTOLOAD"};
961 pass 'no crash from gp_free triggering gv_try_downgrade';
962 sub _121242::DESTROY { delete $_121242::{$_[0][0]} };
963 ${"_121242::foo"} = bless ["foo"], _121242::;
964 undef *{"_121242::foo"};
965 pass 'no crash from pp_undef/gp_free freeing the gv';
966 ${"_121242::bar"} = bless ["bar"], _121242::;
967 *{"_121242::bar"} = "bar";
968 pass 'no crash from sv_setsv/gp_free freeing the gv';
969 ${"_121242::baz"} = bless ["baz"], _121242::;
970 *{"_121242::baz"} = *foo;
971 pass 'no crash from glob_assign_glob/gp_free freeing the gv';
974 undef *_121242::DESTROY;
975 *_121242::DESTROY = sub { undef $foo };
976 my $set_up_foo = sub {
977 # Make $$foo into a fake glob whose array slot holds a blessed
978 # array that undefines $foo, freeing the fake glob.
980 $$foo = do {local *bar};
981 *$$foo = bless [], _121242::;
985 pass 'no crash from sv_setsv/sv_unglob/gp_free freeing the gv';
988 pass 'no crash from sv_utf8_encode/sv_unglob/gp_free freeing the gv';
992 pass 'no crash from do_readline/sv_unglob/gp_free freeing the gv';
996 pass 'no crash from pp_concat/sv_unglob/gp_free freeing the gv';
1000 pass 'no crash from sv_inc/sv_unglob/gp_free freeing the gv';
1003 pass 'no crash from sv_dec/sv_unglob/gp_free freeing the gv';
1006 pass 'no crash from pp_undef/sv_unglob/gp_free freeing the gv';
1009 $$foo =~ s/3/$$foo = do {local *bar}; *$$foo = bless [],_121242::; 4/e;
1010 pass 'no crash from pp_substcont/sv_unglob/gp_free freeing the gv';
1014 eval { *{my $undef} = 3 };
1015 like $@, qr/^Can't use an undefined value as a symbol reference at /,
1016 '*{ $undef } assignment';
1017 eval { *{;undef} = 3 };
1018 like $@, qr/^Can't use an undefined value as a symbol reference at /,
1019 '*{ ;undef } assignment';
1021 # [perl #99142] defined &{"foo"} when there is a constant stub
1022 # If I break your module, you get to have it mentioned in Perl's tests. :-)
1023 package HTTP::MobileAttribute::Plugin::Locator {
1024 use constant LOCATOR_GPS => 1;
1025 ::ok defined &{__PACKAGE__."::LOCATOR_GPS"},
1026 'defined &{"name of constant"}';
1027 ::ok Internals::SvREFCNT(${__PACKAGE__."::"}{LOCATOR_GPS}),
1028 "stash elem for slot is not freed prematurely";
1031 # Check that constants promoted to CVs point to the right GVs when the name
1034 use constant x => 3;
1035 # These two lines abuse the optimisation that copies the scalar ref from
1036 # one stash element to another, to get a constant with a null in its name
1037 *{"yz\0a"} = \&{"x"};
1038 my $ref = \&{"yz\0a"};
1039 ::ok !exists $lrcg::{yz},
1040 'constants w/nulls in their names point 2 the right GVs when promoted';
1045 stat *{"try_downgrade"};
1048 eval "*try_downgrade if 0";
1051 'try_downgrade does not touch PL_statgv (last stat handle)';
1052 readline *{"try_downgrade2"};
1053 my $lastfh = "${^LAST_FH}";
1054 eval "*try_downgrade2 if 0";
1055 is ${^LAST_FH}, $lastfh, 'try_downgrade does not touch PL_last_in_gv';
1058 is runperl(prog => '$s = STDERR; close $s; undef *$s;'
1059 .'eval q-*STDERR if 0-; *$s = *STDOUT{IO}; warn'),
1060 "Warning: something's wrong at -e line 1.\n",
1061 "try_downgrade does not touch PL_stderrgv";
1064 'use constant foo=>1; BEGIN { $x = \&foo } undef &$x; $x->()',
1066 "Undefined subroutine &main::foo called at -e line 1.\n",
1067 "gv_try_downgrade does not anonymise CVs referenced elsewhere";
1070 skip_if_miniperl("no dynamic loading on miniperl, so can't load IO::File", 4);
1072 package glob_constant_test {
1074 use constant bar => *foo;
1075 BEGIN { undef *foo }
1076 ::is eval { bar->() }, eval { &{+bar} },
1077 'glob_constant->() is not mangled at compile time';
1078 ::is "$@", "", 'no error from eval { &{+glob_constant} }';
1079 use constant quux => do {
1084 ::is eval { quux->autoflush; 420 }, 420,
1085 'glob_constant->method() works';
1086 ::is "$@", "", 'no error from eval { glob_constant->method() }';
1093 local $SIG{__WARN__} = sub { ++$free2 if shift =~ /Attempt to free/ };
1095 my $proxy = \$handleref;
1096 open $$proxy, "TEST";
1097 delete $::{*$handleref{NAME}}; # delete *main::_GEN_xxx
1100 'no double free because of bad rv2gv/newGVgen refcounting';
1103 # Look away, please.
1104 # This violates perl's internal structures by fiddling with stashes in a
1105 # way that should never happen, but perl should not start trying to free
1106 # unallocated memory as a result. There is no ok() or is() because the
1107 # panic that used to occur only occurred during global destruction, and
1108 # only with PERL_DESTRUCT_LEVEL=2. (The panic itself was sufficient for
1109 # the harness to consider this test script to have failed.)
1110 $::{aoeuaoeuaoeaoeu} = __PACKAGE__; # cow
1111 () = *{"aoeuaoeuaoeaoeu"};
1117 pass "No crash due to CvGV(vivified stub) pointing to flattened glob copy";
1118 # Not really supported, but this should not crash either:
1120 delete $::{_119051again};
1121 $::{_119051again} = $x; # now we have a fake glob under the right name
1122 $y = \&$x; # so when this tries to look up the right GV for
1123 undef $::{_119051again}; # CvGV, it still gets a fake one
1125 pass "No crash due to CvGV pointing to glob copy in the stash";
1127 # Aliasing should disable no-common-vars optimisation.
1131 ($x, my $z) = (1, $y);
1132 is $z, 3, 'list assignment after aliasing [perl #89646]';