13 is(empty_sub,undef,"Is empty");
14 is(empty_sub(1,2,3),undef,"Is still empty");
16 is(scalar(@test), 0, 'Didnt return anything');
17 @test = empty_sub(1,2,3);
18 is(scalar(@test), 0, 'Didnt return anything');
20 # RT #63790: calling PL_sv_yes as a sub is special-cased to silently
21 # return (so Foo->import() silently fails if import() doesn't exist),
22 # But make sure it correctly pops the stack and mark stack before returning.
26 push @a, 4, 5, main->import(6,7);
27 ok(eq_array(\@a, [4,5]), "import with args");
30 push @a, 14, 15, main->import;
31 ok(eq_array(\@a, [14,15]), "import without args");
36 push @a, 24, 25, &{$x == $x}(26,27);
37 ok(eq_array(\@a, [24,25]), "yes with args");
40 push @a, 34, 35, &{$x == $x};
41 ok(eq_array(\@a, [34,35]), "yes without args");
44 # [perl #81944] return should always copy
47 for my $x ($foo{bar}) {
48 # Pity test.pl doesnt have isn't.
49 isnt \sub { delete $foo{bar} }->(), \$x,
50 'result of delete(helem) is copied when returned';
53 for my $x ($foo{bar}) {
54 isnt \sub { return delete $foo{bar} }->(), \$x,
55 'result of delete(helem) is copied when explicitly returned';
58 isnt \sub { delete $_[0] }->($x), \$x,
59 'result of delete(aelem) is copied when returned';
60 isnt \sub { return delete $_[0] }->($x), \$x,
61 'result of delete(aelem) is copied when explicitly returned';
62 isnt \sub { ()=\@_; shift }->($x), \$x,
63 'result of shift is copied when returned';
64 isnt \sub { ()=\@_; return shift }->($x), \$x,
65 'result of shift is copied when explicitly returned';
69 <<'end', "main::foo\n", {}, 'sub redefinition sets CvGV';
72 eval 'sub bar { print +(caller 0)[3], "\n" }';
77 <<'end', "main::foo\nok\n", {}, 'no double free redefining anon stub';
82 eval 'sub bar { print +(caller 0)[3], "\n" }';
89 # The outer call sets the scalar returned by ${\""}.${\""} to the current
91 # The inner call sets it to "road".
92 # Each call records the value twice, the outer call surrounding the inner
93 # call. In 5.10-5.18 under ithreads, what gets pushed is
94 # qw(main road road road) because the inner call is clobbering the same
95 # scalar. If __PACKAGE__ is changed to "main", it works, the last element
102 a("road",1) unless $_[1];
108 is "@scratch", "main road road main",
109 'recursive calls do not share shared-hash-key TARGs';
111 # Another test for the same bug, that does not rely on foreach. It depends
112 # on ref returning a shared hash key TARG.
115 my ($pack, $depth) = @_;
116 my $o = bless[], $pack;
118 push @scratch, (ref $o, $depth||b($pack,$depth+1))[0];
121 is "@scratch", "o n",
122 'recursive calls do not share shared-hash-key TARGs (2)';
124 # [perl #78194] @_ aliasing op return values
125 sub { is \$_[0], \$_[0],
126 '[perl #78194] \$_[0] == \$_[0] when @_ aliases "$x"' }
129 # The return statement should make no difference in this case:
130 sub not_constant () { 42 }
131 sub not_constantr() { return 42 }
132 use feature 'lexical_subs'; no warnings 'experimental::lexical_subs';
133 my sub not_constantm () { 42 }
134 my sub not_constantmr() { return 42 }
135 eval { ${\not_constant}++ };
136 is $@, "", 'sub (){42} returns a mutable value';
137 eval { ${\not_constantr}++ };
138 is $@, "", 'sub (){ return 42 } returns a mutable value';
139 eval { ${\not_constantm}++ };
140 is $@, "", 'my sub (){42} returns a mutable value';
141 eval { ${\not_constantmr}++ };
142 is $@, "", 'my sub (){ return 42 } returns a mutable value';
145 sub Munchy { $_[0] = 2 }
146 eval "Crunchy"; # test that freeing this op does not turn off PADTMP
148 } || $@, 2, 'freeing ops does not make sub(){42} immutable';
150 # &xsub when @_ has nonexistent elements
152 no warnings "uninitialized";
156 is @_, 1, 'num of elems in @_ after &xsub with nonexistent $_[0]';
157 is $_[0], "", 'content of nonexistent $_[0] is modified by &xsub';
160 # &xsub when @_ itself does not exist
162 eval { &utf8::encode };
163 # The main thing we are testing is that it did not crash. But make sure
164 # *_{ARRAY} was untouched, too.
165 is *_{ARRAY}, undef, 'goto &xsub when @_ does not exist';
167 # We do not want re.pm loaded at this point. Move this test up or find
168 # another XSUB if this fails.
169 ok !exists $INC{"re.pm"}, 're.pm not loaded yet';
174 no warnings 'redefine', 'prototype';
176 *re::regmust = sub{}; # GvSV had no refcount, so this freed it
177 my $str2 = "$_[0]"; # used to be UNKNOWN(0x7fdda29310e0)
178 @str = ($str1, $str2);
180 local $^W; # Suppress redef warnings in XSLoader
183 'XSUB clobbering sub whose DESTROY assigns to the glob';
186 no warnings 'redefine';
188 bless \&foo, 'newATTRSUBbug';
189 sub newATTRSUBbug::DESTROY {
191 *foo = sub{}; # GvSV had no refcount, so this freed it
192 my $str2 = "$_[0]"; # used to be UNKNOWN(0x7fdda29310e0)
193 @str = ($str1, $str2);
198 'Pure-Perl sub clobbering sub whose DESTROY assigns to the glob';
201 # [perl #122107] previously this would return
202 # Subroutine BEGIN redefined at (eval 2) line 2.
203 fresh_perl_is(<<'EOS', "", { stderr => 1 },
204 use strict; use warnings; eval q/use File::{Spec}/; eval q/use File::Spec/;
206 "check special blocks are cleared on error");
208 use constant { constant1 => 1, constant2 => 2 };
211 local $SIG{__WARN__} = sub { $w++ };
212 eval 'sub constant1; sub constant2($)';
213 is eval '&constant1', '1',
214 'stub re-declaration of constant with no prototype';
215 is eval '&constant2', '2',
216 'stub re-declaration of constant with wrong prototype';
217 is $w, 2, 'two warnings from the above';
222 my $parent; # just to make the sub a closure
225 local $depth = $depth + 1;
226 our $ok++, return if $depth == 2;
228 ()= $parent; # just to make the sub a closure
229 our $whatever; # this causes the crash
235 '[perl #122845] no crash in closure recursion with our-vars';
237 () = *predeclared; # vivify the glob at compile time
238 sub predeclared; # now we have a CV stub with no body (incorporeal? :-)
241 sub inside_predeclared {
242 is eval '$x', 42, 'eval q/$var/ in named sub in predeclared sub';
245 predeclared(); # set $x to 42
246 $main::x = $main::x = "You should not see this.";
247 inside_predeclared(); # run test
249 # RT #126845: this used to fail an assertion in Perl_newATTRSUB_x()
250 eval 'sub rt126845_1 (); sub rt126845_1 () :lvalue';
251 pass("RT #126845: stub with prototype, then with attribute");
253 eval 'sub rt126845_2 (); sub rt126845_2 () :lvalue {}';
254 pass("RT #126845: stub with prototype, then definition with attribute");
256 # RT #124156 death during unwinding causes crash
257 # the tie allows us to trigger another die while cleaning up the stack
258 # from an earlier die.
263 sub TIEHASH { bless({}, $_[0]) }
267 sub DELETE { die "outer\n" }
275 local $a{foo} = "bar";
282 ::is($@, "outer\n", "RT124156 plain");
285 sub DESTROY { $destroyed = 1 }
290 $x = 1; # force closure
293 local $a{foo} = "bar";
296 bless $f, 'RT124156';
301 # as opposed to $@ eq "Can't undef active subroutine"
302 ::is($@, "outer\n", "RT124156 depth");
303 ::is($destroyed, 1, "RT124156 freed cv");
307 # check that return pops extraneous stuff from the stack
310 # the extra scopes push contexts and extra SVs on the stack
312 my @a = map $_ + 20, @_;
314 return if defined $_[0] && $_[0] < 0;
317 check_ret(1, do { (2,3,4, return @a ? @a[0..$#a] : ()) }, 4.5);
322 is(scalar check_ret(), undef, "check_ret() scalar");
323 is(scalar check_ret(5), 25, "check_ret(5) scalar");
324 is(scalar check_ret(5,6), 26, "check_ret(5,6) scalar");
325 is(scalar check_ret(5,6,7), 27, "check_ret(5,6,7) scalar");
326 is(scalar check_ret(5,6,7,8), 28, "check_ret(5,6,7,8) scalar");
327 is(scalar check_ret(5,6,7,8,9), 29, "check_ret(5,6,7,8,9) scalar");
329 is(scalar check_ret(-1), undef, "check_ret(-1) scalar");
330 is(scalar check_ret(-1,5), undef, "check_ret(-1,5) scalar");
332 is(join('-', 10, check_ret()), "10", "check_ret() list");
333 is(join('-', 10, check_ret(5)), "10-25", "check_ret(5) list");
334 is(join('-', 10, check_ret(5,6)), "10-25-26", "check_ret(5,6) list");
335 is(join('-', 10, check_ret(5,6,7)), "10-25-26-27", "check_ret(5,6,7) list");
336 is(join('-', 10, check_ret(5,6,7,8)), "10-25-26-27-28", "check_ret(5,6,7,8) list");
337 is(join('-', 10, check_ret(5,6,7,8,9)), "10-25-26-27-28-29", "check_ret(5,6,7,8,9) list");
339 is(join('-', 10, check_ret(-1)), "10", "check_ret(-1) list");
340 is(join('-', 10, check_ret(-1,5)), "10", "check_ret(-1,5) list");