print STDERR $m1, $g1, $ga[1],$m2;
print STDERR "", $ga[1],"";
EXPECT
-Use of uninitialized value $ga[1000] in print at - line 5.
-Use of uninitialized value $ga[1000] in print at - line 6.
+Use of uninitialized value in print at - line 5.
+Use of uninitialized value in print at - line 6.
Use of uninitialized value $m1 in print at - line 7.
Use of uninitialized value $g1 in print at - line 7.
Use of uninitialized value in print at - line 7.
Use of uninitialized value $m2 in print at - line 7.
-Use of uninitialized value $ga[1] in print at - line 8.
+Use of uninitialized value in print at - line 8.
########
use warnings 'uninitialized';
my ($m1);
$v = @$g1;
$v = %$m2;
$v = %$g2;
+
+$v = ${"foo.bar"}+1;
+$v = ${"foo$m1"}+1;
+$v = ${"foo$g1"}+1;
EXPECT
Use of uninitialized value $m1 in scalar dereference at - line 5.
Use of uninitialized value $g1 in scalar dereference at - line 6.
Use of uninitialized value $g1 in array dereference at - line 9.
Use of uninitialized value $m2 in hash dereference at - line 10.
Use of uninitialized value $g2 in hash dereference at - line 11.
+Use of uninitialized value in addition (+) at - line 13.
+Use of uninitialized value $m1 in concatenation (.) or string at - line 14.
+Use of uninitialized value in addition (+) at - line 14.
+Use of uninitialized value $g1 in concatenation (.) or string at - line 15.
+Use of uninitialized value in addition (+) at - line 15.
########
use warnings 'uninitialized';
my ($m1, $v);
EXPECT
Use of uninitialized value $s1 in scalar chomp at - line 3.
Use of uninitialized value $s2 in scalar chop at - line 4.
-Use of uninitialized value $s4 in chomp at - line 5.
Use of uninitialized value $s3 in chomp at - line 5.
+Use of uninitialized value $s4 in chomp at - line 5.
Use of uninitialized value $s5 in chop at - line 6.
Use of uninitialized value $s6 in chop at - line 6.
########
EXPECT
Use of uninitialized value ${$/} in scalar chomp at - line 6.
Use of uninitialized value ${$/} in chomp at - line 8.
-Use of uninitialized value $y in chomp at - line 8.
Use of uninitialized value ${$/} in chomp at - line 8.
+Use of uninitialized value $y in chomp at - line 8.
Use of uninitialized value $y in chop at - line 8.
########
use warnings 'uninitialized';
Use of uninitialized value $g1 in exists at - line 8.
########
use warnings 'uninitialized';
+my ($m1, $m2);
+my ($v, @a);
+my ($t, $u) = (1, 1);
+
+local $.;
+
+@ma = (1 .. 2);
+@ma = ($t .. 2);
+@ma = ($m1 .. 2);
+@ma = (1 .. $u);
+@ma = (1 .. $m2);
+
+@ma = (1 ... 2);
+@ma = ($t ... 2);
+@ma = ($m1 ... 2);
+@ma = (1 ... $u);
+@ma = (1 ... $m2);
+
+$v = (1 .. 2);
+$v = ($t .. 2);
+$v = ($m1 .. 2);
+$v = (1 .. $u);
+$v = (1 .. $m2);
+
+$v = (1 ... 2);
+$v = ($t ... 2);
+$v = ($m1 ... 2);
+$v = (1 ... $u);
+$v = (1 ... $m2);
+EXPECT
+Use of uninitialized value $m1 in range (or flop) at - line 10.
+Use of uninitialized value $m2 in range (or flop) at - line 12.
+Use of uninitialized value $m1 in range (or flop) at - line 16.
+Use of uninitialized value $m2 in range (or flop) at - line 18.
+Use of uninitialized value $. in range (or flip) at - line 20.
+Use of uninitialized value $. in range (or flop) at - line 21.
+Use of uninitialized value $. in range (or flip) at - line 23.
+Use of uninitialized value $. in range (or flip) at - line 24.
+Use of uninitialized value $. in range (or flip) at - line 26.
+Use of uninitialized value $. in range (or flip) at - line 29.
+Use of uninitialized value $. in range (or flip) at - line 30.
+########
+use warnings 'uninitialized';
+my ($m1, $m2);
+my ($v, @a);
+my ($t, $u) = (1, 1);
+
+@ma = ($t .. $u);
+@ma = ($m1 .. $u);
+@ma = ($t .. $m2);
+@ma = ($m1 .. $m2);
+
+@ma = ($t ... $u);
+@ma = ($m1 ... $u);
+@ma = ($t ... $m2);
+@ma = ($m1 ... $m2);
+
+$v = ($t .. $u);
+$v = ($m1 .. $u);
+$v = ($t .. $m2);
+$v = ($m1 .. $m2);
+
+$v = ($t ... $u);
+$v = ($m1 ... $u);
+$v = ($t ... $m2);
+$v = ($m1 ... $m2);
+EXPECT
+Use of uninitialized value $m1 in range (or flop) at - line 7.
+Use of uninitialized value $m2 in range (or flop) at - line 8.
+Use of uninitialized value in range (or flop) at - line 9.
+Use of uninitialized value in range (or flop) at - line 9.
+Use of uninitialized value $m1 in range (or flop) at - line 12.
+Use of uninitialized value $m2 in range (or flop) at - line 13.
+Use of uninitialized value in range (or flop) at - line 14.
+Use of uninitialized value in range (or flop) at - line 14.
+########
+use warnings 'uninitialized';
my ($m1, $v);
our ($g1);
Use of uninitialized value $m1 in integer lt (<) at - line 13.
Use of uninitialized value $g1 in integer gt (>) at - line 14.
Use of uninitialized value $m1 in integer gt (>) at - line 14.
-Use of uninitialized value $g1 in integer le (<=) at - line 15.
Use of uninitialized value $m1 in integer le (<=) at - line 15.
-Use of uninitialized value $g1 in integer ge (>=) at - line 16.
+Use of uninitialized value $g1 in integer le (<=) at - line 15.
Use of uninitialized value $m1 in integer ge (>=) at - line 16.
-Use of uninitialized value $g1 in integer eq (==) at - line 17.
+Use of uninitialized value $g1 in integer ge (>=) at - line 16.
Use of uninitialized value $m1 in integer eq (==) at - line 17.
-Use of uninitialized value $g1 in integer ne (!=) at - line 18.
+Use of uninitialized value $g1 in integer eq (==) at - line 17.
Use of uninitialized value $m1 in integer ne (!=) at - line 18.
-Use of uninitialized value $g1 in integer comparison (<=>) at - line 19.
+Use of uninitialized value $g1 in integer ne (!=) at - line 18.
Use of uninitialized value $m1 in integer comparison (<=>) at - line 19.
+Use of uninitialized value $g1 in integer comparison (<=>) at - line 19.
Use of uninitialized value $m1 in integer negation (-) at - line 20.
########
use warnings 'uninitialized';
$v = abs($g2);
EXPECT
Use of uninitialized value $g1 in int at - line 5.
-Use of uninitialized value $g1 in int at - line 5.
-Use of uninitialized value $g2 in abs at - line 6.
Use of uninitialized value $g2 in abs at - line 6.
########
use warnings 'uninitialized';
Use of uninitialized value $g1 in subroutine prototype at - line 6.
Use of uninitialized value $g1 in bless at - line 7.
Use of uninitialized value $m1 in quoted execution (``, qx) at - line 8.
-Use of uninitialized value $g1 in concatenation (.) or string at - line 10.
Use of uninitialized value $m1 in concatenation (.) or string at - line 10.
+Use of uninitialized value $g1 in concatenation (.) or string at - line 10.
########
use warnings 'uninitialized';
my ($m1);
$foo =~ s//$g1/;
$foo =~ s/$m1/$g1/;
$foo =~ s/./$m1/e;
+undef $g1;
+$m1 = '$g1';
+$foo =~ s//$m1/ee;
EXPECT
Use of uninitialized value $_ in pattern match (m//) at - line 5.
Use of uninitialized value $m1 in regexp compilation at - line 6.
Use of uninitialized value $m1 in regexp compilation at - line 40.
Use of uninitialized value $g1 in substitution iterator at - line 40.
Use of uninitialized value $m1 in substitution iterator at - line 41.
+Use of uninitialized value in substitution iterator at - line 44.
########
use warnings 'uninitialized';
my ($m1);
########
use warnings 'uninitialized';
my ($m1);
+our ($g1);
+
+$v = pos($m1) + 1;
+$v = pos($g1) + 1;
+$m1 = 0;
+$g1 = "";
+$v = pos($m1) + 1;
+$v = pos($g1) + 1;
+EXPECT
+Use of uninitialized value in addition (+) at - line 5.
+Use of uninitialized value in addition (+) at - line 6.
+Use of uninitialized value in addition (+) at - line 9.
+Use of uninitialized value in addition (+) at - line 10.
+########
+use warnings 'uninitialized';
+my ($m1);
{ my $x = "a" x $m1 } # NB LHS of repeat does not warn
{ my @x = ("a") x $m1 }
$v = sqrt $m1;
$v = hex $m1;
$v = oct $m1;
-$v = length $m1;
-$v = length;
+$v = oct;
+$v = length; # does not warn
EXPECT
-Use of uninitialized value $g1 in atan2 at - line 5.
Use of uninitialized value $m1 in atan2 at - line 5.
+Use of uninitialized value $g1 in atan2 at - line 5.
Use of uninitialized value $m1 in sin at - line 6.
Use of uninitialized value $m1 in cos at - line 7.
Use of uninitialized value $m1 in rand at - line 8.
Use of uninitialized value $m1 in sqrt at - line 12.
Use of uninitialized value $m1 in hex at - line 13.
Use of uninitialized value $m1 in oct at - line 14.
-Use of uninitialized value $m1 in length at - line 15.
-Use of uninitialized value $_ in length at - line 16.
+Use of uninitialized value $_ in oct at - line 15.
########
use warnings 'uninitialized';
my ($m1, $v);
Use of uninitialized value $m2 in substr at - line 7.
Use of uninitialized value $g1 in substr at - line 7.
Use of uninitialized value $m1 in substr at - line 7.
-Use of uninitialized value $m1 in substr at - line 7.
Use of uninitialized value $g1 in substr at - line 8.
Use of uninitialized value $m1 in substr at - line 8.
Use of uninitialized value in scalar assignment at - line 8.
Use of uninitialized value $g1 in index at - line 15.
Use of uninitialized value $m1 in index at - line 15.
Use of uninitialized value $m2 in index at - line 15.
-Use of uninitialized value $m2 in rindex at - line 16.
Use of uninitialized value $m1 in rindex at - line 16.
+Use of uninitialized value $m2 in rindex at - line 16.
Use of uninitialized value $g1 in rindex at - line 17.
-Use of uninitialized value $m2 in rindex at - line 17.
Use of uninitialized value $m1 in rindex at - line 17.
+Use of uninitialized value $m2 in rindex at - line 17.
########
use warnings 'uninitialized';
my ($m1, $v);
$v = sprintf $m1;
$v = sprintf '%d%d%d%d', $m1, $m2, $g1, $g2;
-eval {formline $m1 }; undef $m1;
+my $m3; eval {formline $m3 };
formline '@<<@<<@<<@<<', $m1, $m2, $g1, $g2;
EXPECT
Use of uninitialized value $m1 in sprintf at - line 5.
Use of uninitialized value $m2 in sprintf at - line 6.
Use of uninitialized value $g1 in sprintf at - line 6.
Use of uninitialized value $g2 in sprintf at - line 6.
-Use of uninitialized value $m1 in formline at - line 7.
+Use of uninitialized value $m3 in formline at - line 7.
Use of uninitialized value $m1 in formline at - line 8.
Use of uninitialized value $m2 in formline at - line 8.
Use of uninitialized value $g1 in formline at - line 8.
$v = chr;
$v = chr $m1;
-# XXX these functions don't warn!
$v = ucfirst;
$v = ucfirst $m1;
$v = lcfirst;
Use of uninitialized value $m1 in ord at - line 8.
Use of uninitialized value $_ in chr at - line 9.
Use of uninitialized value $m1 in chr at - line 10.
-Use of uninitialized value $_ in quotemeta at - line 22.
-Use of uninitialized value $m1 in quotemeta at - line 23.
+Use of uninitialized value $_ in ucfirst at - line 12.
+Use of uninitialized value $m1 in ucfirst at - line 13.
+Use of uninitialized value $_ in lcfirst at - line 14.
+Use of uninitialized value $m1 in lcfirst at - line 15.
+Use of uninitialized value $_ in uc at - line 16.
+Use of uninitialized value $m1 in uc at - line 17.
+Use of uninitialized value $_ in lc at - line 18.
+Use of uninitialized value $m1 in lc at - line 19.
+Use of uninitialized value $_ in quotemeta at - line 21.
+Use of uninitialized value $m1 in quotemeta at - line 22.
########
use warnings 'uninitialized';
my ($m1, $v1, $v2, $v3, $v4);
my %h = ("\0011\002\r\n\t\f\"\\abcdefghijklmnopqrstuvwxyz", undef);
$v = join '', %h;
EXPECT
-Use of uninitialized value $h{"\0011\2\r\n\t\f\"\\abcdefghijkl"...} in join or string at - line 6.
+Use of uninitialized value $h{"\0011\2\r\n\t\f\"\\abcdefghijklm"...} in join or string at - line 6.
########
use warnings 'uninitialized';
my ($m1, $v);
reset $g1;
EXPECT
Use of uninitialized value $m1 in subroutine dereference at - line 5.
-Use of uninitialized value $m1 in subroutine dereference at - line 5.
-Use of uninitialized value $g1 in subroutine dereference at - line 6.
Use of uninitialized value $g1 in subroutine dereference at - line 6.
Use of uninitialized value $m1 in splice at - line 9.
Use of uninitialized value $g1 in splice at - line 9.
Use of uninitialized value $g1 in splice at - line 10.
Use of uninitialized value in addition (+) at - line 10.
Use of uninitialized value $m1 in method lookup at - line 13.
-Use of uninitialized value $m1 in subroutine entry at - line 15.
-Use of uninitialized value $g1 in subroutine entry at - line 16.
+Use of uninitialized value in subroutine entry at - line 15.
+Use of uninitialized value in subroutine entry at - line 16.
Use of uninitialized value $m1 in warn at - line 18.
Use of uninitialized value $g1 in warn at - line 18.
foo at - line 18.
Use of uninitialized value $m1 in umask at - line 19.
Use of uninitialized value $g1 in umask at - line 20.
Use of uninitialized value $m1 in binmode at - line 23.
-Use of uninitialized value $m1 in binmode at - line 23.
########
use warnings 'uninitialized';
my ($m1);
eval { my $x; sysread $m1, $x, $g1, $g2 };
EXPECT
Use of uninitialized value $m1 in tie at - line 5.
-Use of uninitialized value $m1 in tie at - line 5.
Use of uninitialized value $m1 in ref-to-glob cast at - line 7.
Use of uninitialized value $g1 in read at - line 7.
Use of uninitialized value $m1 in ref-to-glob cast at - line 8.
Use of uninitialized value $g1 in printf at - line 6.
Use of uninitialized value $g2 in printf at - line 6.
0000
-Use of uninitialized value $ga[1000] in printf at - line 7.
-Use of uninitialized value $ga[1000] in printf at - line 8.
+Use of uninitialized value in printf at - line 7.
+Use of uninitialized value in printf at - line 8.
FOO1:
Use of uninitialized value $m1 in printf at - line 9.
Use of uninitialized value $g1 in printf at - line 9.
Use of uninitialized value in printf at - line 9.
Use of uninitialized value $m2 in printf at - line 9.
FOO2:
-Use of uninitialized value $ga[1] in printf at - line 10.
+Use of uninitialized value in printf at - line 10.
FOO3:XY
########
use warnings 'uninitialized';
eval { my $x; seek $x,$m1, $g1 };
eval { my $x; sysseek $x,$m1, $g1 };
-eval { syswrite $m1, $g1 };
-eval { syswrite STDERR, $m1 };
-eval { syswrite STDERR, $m1, $g1 };
-eval { syswrite STDERR, $m1, $g1, $m2 };
-eval { my $x; flock $x, $g1 };
+eval { syswrite $m1, $g1 }; # logic changed - now won't try $g1 if $m1 is bad
+# eval { syswrite STDERR, $m1 }; # XXX under utf8, can give
+# eval { syswrite STDERR, $m1, $g1 }; # XXX different warnings
+# eval { syswrite STDERR, $m1, $g1, $m2 };
eval { my $x; socket $x, $m1, $g1, $m2 };
eval { my ($x,$y); socketpair $x, $y, $m1, $g1, $m2 };
EXPECT
Use of uninitialized value $g1 in sysseek at - line 6.
Use of uninitialized value $m1 in sysseek at - line 6.
Use of uninitialized value $m1 in ref-to-glob cast at - line 7.
-Use of uninitialized value $g1 in syswrite at - line 7.
-Use of uninitialized value $m1 in syswrite at - line 8.
-Use of uninitialized value $m1 in syswrite at - line 8.
-Use of uninitialized value $g1 in syswrite at - line 9.
-Use of uninitialized value $m1 in syswrite at - line 9.
-Use of uninitialized value $g1 in syswrite at - line 10.
-Use of uninitialized value $m1 in syswrite at - line 10.
-Use of uninitialized value $m2 in syswrite at - line 10.
-Use of uninitialized value $x in ref-to-glob cast at - line 11.
-Use of uninitialized value $g1 in flock at - line 11.
-Use of uninitialized value $m2 in socket at - line 12.
-Use of uninitialized value $g1 in socket at - line 12.
-Use of uninitialized value $m1 in socket at - line 12.
-Use of uninitialized value $m2 in socketpair at - line 13.
-Use of uninitialized value $g1 in socketpair at - line 13.
-Use of uninitialized value $m1 in socketpair at - line 13.
+Use of uninitialized value $m2 in socket at - line 11.
+Use of uninitialized value $g1 in socket at - line 11.
+Use of uninitialized value $m1 in socket at - line 11.
+Use of uninitialized value $m2 in socketpair at - line 12.
+Use of uninitialized value $g1 in socketpair at - line 12.
+Use of uninitialized value $m1 in socketpair at - line 12.
+########
+use Config;
+BEGIN {
+ if ( !$Config{d_flock} &&
+ !$Config{d_fcntl_can_lock} &&
+ !$Config{d_lockf} ) {
+ print <<EOM ;
+SKIPPED
+# flock not present
+EOM
+ exit ;
+ }
+}
+use warnings 'uninitialized';
+our ($g1);
+
+eval { my $x; flock $x, $g1 };
+EXPECT
+Use of uninitialized value $x in ref-to-glob cast at - line 16.
+Use of uninitialized value $g1 in flock at - line 16.
########
use warnings 'uninitialized';
my ($m1, $v);
$v = -w $m1;
$v = -x $m1;
$v = -e $m1;
-$v = -O $m1;
$v = -o $m1;
+$v = -O $m1;
$v = -z $m1;
$v = -s $m1;
$v = -M $m1;
$v = -l $m1;
$v = -u $m1;
$v = -g $m1;
-$v = -k $m1;
+# $v = -k $m1; # XXX this is a no-op under win32
$v = -t $m1;
$v = -T $m1;
$v = -B $m1;
Use of uninitialized value $m1 in -d at - line 28.
Use of uninitialized value $m1 in -p at - line 29.
Use of uninitialized value $m1 in -l at - line 30.
-Use of uninitialized value $m1 in -l at - line 30.
Use of uninitialized value $m1 in -u at - line 31.
Use of uninitialized value $m1 in -g at - line 32.
-Use of uninitialized value $m1 in -k at - line 33.
Use of uninitialized value $m1 in -t at - line 34.
Use of uninitialized value $m1 in -T at - line 35.
Use of uninitialized value $m1 in -B at - line 36.
Use of uninitialized value $g1 in gmtime at - line 6.
########
use warnings 'uninitialized';
-my ($m1, $v);
+my ($m1, $m2, $v);
$v = eval;
$v = eval $m1;
+$m2 = q($m1); $v = 1 + eval $m2;
EXPECT
Use of uninitialized value $_ in eval "string" at - line 4.
-Use of uninitialized value $_ in eval "string" at - line 4.
-Use of uninitialized value $_ in eval "string" at - line 4.
-Use of uninitialized value $m1 in eval "string" at - line 5.
-Use of uninitialized value $m1 in eval "string" at - line 5.
Use of uninitialized value $m1 in eval "string" at - line 5.
+Use of uninitialized value in addition (+) at - line 6.
########
use warnings 'uninitialized';
my ($m1);
exit $m1;
EXPECT
Use of uninitialized value $m1 in exit at - line 4.
+########
+use warnings 'uninitialized';
+my $undef;
+
+if ($undef == 3) {
+} elsif ($undef == 0) {
+}
+EXPECT
+Use of uninitialized value $undef in numeric eq (==) at - line 4.
+Use of uninitialized value $undef in numeric eq (==) at - line 5.
+########
+# TODO long standing bug - conditions of while loops
+use warnings;
+
+my $c;
+my $d = 1;
+while ($c == 0 && $d) {
+ # a
+ # few
+ # blank
+ # lines
+ undef $d;
+}
+EXPECT
+Use of uninitialized value $c in numeric eq (==) at - line 5.
+Use of uninitialized value $c in numeric eq (==) at - line 5.
+########
+# TODO long standing bug - conditions of until loops
+use warnings;
+
+my $c;
+my $d;
+until ($c == 1) {
+ # a
+ # few
+ # blank
+ # lines
+ $c = 1 if ++$d == 2;
+}
+EXPECT
+Use of uninitialized value $c in numeric eq (==) at - line 5.
+Use of uninitialized value $c in numeric eq (==) at - line 5.
+########
+# TODO long standing bug - conditions of for loops
+use warnings;
+
+my $c;
+my $d;
+for ($d = 1; $c == 0 && $d; ) {
+ # a
+ # few
+ # blank
+ # lines
+ undef $d;
+}
+
+my $e;
+for ($d = 2; $d > 0; $e = !($c == 0)) {
+ # a
+ # few
+ # blank
+ # lines
+ --$d;
+}
+EXPECT
+Use of uninitialized value $c in numeric eq (==) at - line 5.
+Use of uninitialized value $c in numeric eq (==) at - line 5.
+Use of uninitialized value $c in numeric eq (==) at - line 14.
+Use of uninitialized value $c in numeric eq (==) at - line 14.
+########
+# TODO long standing bug - more general variant of the above problem
+use warnings;
+my $undef;
+
+my $a = $undef + 1;
+my $b
+ = $undef
+ + 1;
+EXPECT
+Use of uninitialized value $undef in addition (+) at - line 4.
+Use of uninitialized value $undef in addition (+) at - line 7.
+########
+use warnings 'uninitialized';
+my ($r1, $r2);
+$_ = undef;
+$v = reverse;
+$v = reverse $r1;
+$v = reverse "abc", $r2, "def";
+EXPECT
+Use of uninitialized value in reverse at - line 4.
+Use of uninitialized value $r1 in reverse at - line 5.
+Use of uninitialized value $r2 in reverse at - line 6.
+########
+use warnings 'uninitialized';
+#
+# ops that can return undef for defined args
+# split into separate tests to diagnose the cause of daily build smoke
+#
+# *** `` not tested: Windows produces an error on STDERR
+# *** ditto qx()
+# *** pipe() not tested
+# *** ioctl not tested
+# *** socket not tested
+# *** socketpair not tested
+# *** bind not tested
+# *** connect not tested
+# *** listen not tested
+# *** shutdown not tested
+# *** setsockopt not tested
+# *** getpeername not tested
+# *** readdir not tested
+# *** telldir not tested
+# *** seekdir not tested
+# *** rewinddir not tested
+# *** closedir not tested
+# *** gmtime not tested
+# *** alarm not tested
+# *** semget not tested
+# *** getlogin not tested
+EXPECT
+########
+use warnings 'uninitialized';
+if ($^O eq 'MSWin32') {
+ print <<'EOM';
+SKIPPED
+# `` produces an error on STDERR on Win32
+EOM
+ exit;
+}
+my $nocmd = '/no/such/command';
+my $v;
+$v = 1 + `$nocmd`;
+EXPECT
+Use of uninitialized value in addition (+) at - line 11.
+########
+use warnings 'uninitialized';
+if ($^O eq 'MSWin32') {
+ print <<'EOM';
+SKIPPED
+# qx produces an error on STDERR on Win32
+EOM
+ exit;
+}
+my $nocmd = '/no/such/command';
+my $v;
+$v = 1 + qx($nocmd);
+EXPECT
+Use of uninitialized value in addition (+) at - line 11.
+########
+use warnings 'uninitialized';
+my $nan = "NaN";
+if ($nan == $nan) {
+ print <<'EOM';
+SKIPPED
+# NaN not supported here.
+EOM
+ exit;
+}
+my $v;
+$v = 1 + ($nan <=> 1);
+EXPECT
+Use of uninitialized value in addition (+) at - line 11.
+########
+use warnings 'uninitialized';
+if ($^O eq 'MSWin32') {
+ print <<'EOM';
+SKIPPED
+# -k produces no warning on Win32
+EOM
+ exit;
+}
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + -k $nofile;
+EXPECT
+Use of uninitialized value in addition (+) at - line 11.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+my $f = "";
+$v = 1 + open($f, $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 5.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + fileno($nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + binmode($nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + tied($nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + getc($nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + sysread($nofile, my $buf,1);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + eval { send($nofile, $buf,0) };
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+my $fh = "";
+$v = 1 + eval { accept($fh, $nofile) };
+EXPECT
+Use of uninitialized value in addition (+) at - line 5.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-r $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-w $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-x $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-o $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-R $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-W $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-X $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-O $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-e $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-z $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-s $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-f $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-d $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-l $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-p $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-S $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-b $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-c $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-t $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-u $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-g $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-T $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-B $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-M $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-A $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + (-C $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + eval { readlink $nofile };
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + opendir($f, $nofile);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + undef;
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+my $x = 1; $v = 1 + undef($x);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $emptys = "";
+$v = 1 + substr($emptys,2,1);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my @emptya;
+$v = 1 + each @emptya;
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my %emptyh;
+$v = 1 + each %emptyh;
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my @emptya;
+$v = 1 + sort @emptya;
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $zero = 0; $v = 1 + caller($zero);
+EXPECT
+Use of uninitialized value in addition (+) at - line 3.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+$v = 1 + do $nofile;
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $fn = sub {};
+$v = 1 + prototype $fn;
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $fn = sub {};
+$v = 1 + (1 ~~ $fn);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $f = "";
+$v = 1 + (print STDIN $f); # print to STDIN returns undef
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $f = "";
+$v = 1 + (printf STDIN "%s", $f);
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $f = "";
+{ use feature 'say'; $v = 1 + (say STDIN "%s", $f); }
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $v;
+my $f = "";
+$v = 1 + (unpack("",$f));
+EXPECT
+Use of uninitialized value in addition (+) at - line 4.
+########
+use warnings 'uninitialized';
+my $nofile = '/no/such/file';
+my $v;
+my $f = "";
+$v = 1 + sysopen($f, $nofile, 0);
+EXPECT
+Use of uninitialized value in addition (+) at - line 5.
+########
+use warnings 'uninitialized';
+my $v;
+{ my $x = -1; $v = 1 + sysseek(DATA, $x, 0); }
+__END__
+EXPECT
+Use of uninitialized value in addition (+) at - line 3.
+########
+use warnings 'uninitialized';
+delete $::{'Foo::'};
+my $moo = $Foo::BAR + 42;
+__END__
+EXPECT
+Use of uninitialized value in addition (+) at - line 3.
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