Fix warn to respect utf8-encoded scalars [perl #45549]

[perl5.git] / t / op / stash.t

#!./perl

BEGIN {
    chdir 't' if -d 't';
    @INC = qw(../lib);
}

BEGIN { require "./test.pl"; }

plan( tests => 38 );

# Used to segfault (bug #15479)
fresh_perl_like(
    '%:: = ""',
    qr/Odd number of elements in hash assignment at - line 1\./,
    { switches => [ '-w' ] },
    'delete $::{STDERR} and print a warning',
);

# Used to segfault
fresh_perl_is(
    'BEGIN { $::{"X::"} = 2 }',
    '',
    { switches => [ '-w' ] },
    q(Insert a non-GV in a stash, under warnings 'once'),
);

{
    no warnings 'deprecated';
    ok( defined %oedipa::maas::, q(stashes happen to be defined if not used) );
    ok( defined %{"oedipa::maas::"}, q(- work with hard refs too) );

    ok( defined %tyrone::slothrop::, q(stashes are defined if seen at compile time) );
    ok( defined %{"tyrone::slothrop::"}, q(- work with hard refs too) );

    ok( defined %bongo::shaftsbury::, q(stashes are defined if a var is seen at compile time) );
    ok( defined %{"bongo::shaftsbury::"}, q(- work with hard refs too) );
}

package tyrone::slothrop;
$bongo::shaftsbury::scalar = 1;

package main;

# Used to warn
# Unbalanced string table refcount: (1) for "A::" during global destruction.
# for ithreads.
{
    local $ENV{PERL_DESTRUCT_LEVEL} = 2;
    fresh_perl_is(
		  'package A; sub a { // }; %::=""',
		  '',
		  '',
		  );
}

# now tests in eval

ok( eval  { no warnings 'deprecated'; defined %achtfaden:: },   'works in eval{}' );
ok( eval q{ no warnings 'deprecated'; defined %schoenmaker:: }, 'works in eval("")' );

# now tests with strictures

{
    use strict;
    no warnings 'deprecated';
    ok( defined %pig::, q(referencing a non-existent stash doesn't produce stricture errors) );
    ok( !exists $pig::{bodine}, q(referencing a non-existent stash element doesn't produce stricture errors) );
}

SKIP: {
    eval { require B; 1 } or skip "no B", 18;

    *b = \&B::svref_2object;
    my $CVf_ANON = B::CVf_ANON();

    my $sub = do {
        package one;
        \&{"one"};
    };
    delete $one::{one};
    my $gv = b($sub)->GV;

    isa_ok( $gv, "B::GV", "deleted stash entry leaves CV with valid GV");
    is( b($sub)->CvFLAGS & $CVf_ANON, $CVf_ANON, "...and CVf_ANON set");
    is( eval { $gv->NAME }, "__ANON__", "...and an __ANON__ name");
    is( eval { $gv->STASH->NAME }, "one", "...but leaves stash intact");

    $sub = do {
        package two;
        \&{"two"};
    };
    %two:: = ();
    $gv = b($sub)->GV;

    isa_ok( $gv, "B::GV", "cleared stash leaves CV with valid GV");
    is( b($sub)->CvFLAGS & $CVf_ANON, $CVf_ANON, "...and CVf_ANON set");
    is( eval { $gv->NAME }, "__ANON__", "...and an __ANON__ name");
    is( eval { $gv->STASH->NAME }, "__ANON__", "...and an __ANON__ stash");

    $sub = do {
        package three;
        \&{"three"};
    };
    undef %three::;
    $gv = b($sub)->GV;

    isa_ok( $gv, "B::GV", "undefed stash leaves CV with valid GV");
    is( b($sub)->CvFLAGS & $CVf_ANON, $CVf_ANON, "...and CVf_ANON set");
    is( eval { $gv->NAME }, "__ANON__", "...and an __ANON__ name");
    is( eval { $gv->STASH->NAME }, "__ANON__", "...and an __ANON__ stash");

    my $sub = do {
	package four;
	sub { 1 };
    };
    %four:: = ();

    my $gv = B::svref_2object($sub)->GV;
    ok($gv->isa(q/B::GV/), "cleared stash leaves anon CV with valid GV");

    my $st = eval { $gv->STASH->NAME };
    { local $TODO = 'STASHES not anonymized';
	is($st, q/__ANON__/, "...and an __ANON__ stash");
    }

    my $sub = do {
	package five;
	sub { 1 };
    };
    undef %five::;

    $gv = B::svref_2object($sub)->GV;
    ok($gv->isa(q/B::GV/), "undefed stash leaves anon CV with valid GV");

    $st = eval { $gv->STASH->NAME };
    { local $TODO = 'STASHES not anonymized';
	is($st, q/__ANON__/, "...and an __ANON__ stash");
    }

    # [perl #58530]
    fresh_perl_is(
        'sub foo { 1 }; use overload q/""/ => \&foo;' .
            'delete $main::{foo}; bless []',
        "",
        {},
        "no segfault with overload/deleted stash entry [#58530]",
    );

    # CvSTASH should be null on a named sub if the stash has been deleted
    {
	package FOO;
	sub foo {}
	my $rfoo = \&foo;
	package main;
	delete $::{'FOO::'};
	my $cv = B::svref_2object($rfoo);
	# (is there a better way of testing for NULL ?)
	my $stash = $cv->STASH;
	like($stash, qr/B::SPECIAL/, "NULL CvSTASH on named sub");
    }

    # on glob reassignment, orphaned CV should have anon CvGV

    {
	my $r;
	eval q[
	    package FOO2;
	    sub f{};
	    $r = \&f;
	    *f = sub {};
	];
	delete $FOO2::{f};
	my $cv = B::svref_2object($r);
	my $gv = $cv->GV;
	ok($gv->isa(q/B::GV/), "orphaned CV has valid GV");
	is($gv->NAME, '__ANON__', "orphaned CV has anon GV");
    }

    # deleting __ANON__ glob shouldn't break things

    {
	package FOO3;
	sub named {};
	my $anon = sub {};
	my $named = eval q[\&named];
	package main;
	delete $FOO3::{named}; # make named anonymous

	delete $FOO3::{__ANON__}; # whoops!
	my ($cv,$gv);
	$cv = B::svref_2object($named);
	$gv = $cv->GV;
	ok($gv->isa(q/B::GV/), "ex-named CV has valid GV");
	is($gv->NAME, '__ANON__', "ex-named CV has anon GV");

	$cv = B::svref_2object($anon);
	$gv = $cv->GV;
	ok($gv->isa(q/B::GV/), "anon CV has valid GV");
	is($gv->NAME, '__ANON__', "anon CV has anon GV");
    }
}

# make sure having a sub called __ANON__ doesn't confuse perl.

{
    my $c;
    sub __ANON__ { $c = (caller(0))[3]; }
    __ANON__();
    is ($c, 'main::__ANON__', '__ANON__ sub called ok');
}