Use of uninitialized value $m1 in addition (+) at - line 6.
########
use warnings 'uninitialized';
+use utf8;
+use open qw( :utf8 :std );
+
+$v = $à1 + 10;
+$v = 22 + $ａ2;
+$v = $à1 + $ａ2;
+EXPECT
+Use of uninitialized value $à1 in addition (+) at - line 5.
+Use of uninitialized value $ａ2 in addition (+) at - line 6.
+Use of uninitialized value $ａ2 in addition (+) at - line 7.
+Use of uninitialized value $à1 in addition (+) at - line 7.
+########
+use warnings 'uninitialized';
my ($m1, $v);
our ($g1, $g2);
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);
close $m1; # exercises rv2gv
close $g1; # exercises rv2gv
+close undef; # exercises rv2gv
EXPECT
Use of uninitialized value $m1 in ref-to-glob cast at - line 5.
Use of uninitialized value $g1 in ref-to-glob cast at - line 6.
+Use of uninitialized value in ref-to-glob cast at - line 7.
########
use warnings 'uninitialized';
my ($m1, $m2, $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.
########
my $y;
chomp ($x, $y); chop ($x, $y);
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 $m1 in scalar assignment at - line 4.
+Use of uninitialized value $m1 in scalar assignment at - line 4.
+Setting $/ to a reference to zero as a form of slurp is deprecated, treating as undef at - line 4.
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 $m1 in range (or flop) at - line 9.
+Use of uninitialized value $m2 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 $m1 in range (or flop) at - line 14.
+Use of uninitialized value $m2 in range (or flop) at - line 14.
+########
+use warnings 'uninitialized';
my ($m1, $v);
our ($g1);
@sort = sort {$a <=> $b} $m1, $g1;
sub sortf {$a-1 <=> $b-1};
@sort = sort &sortf, $m1, $g1;
+@sort = sort { undef } 1, 2;
+sub frobnicate($$) { undef }
+@sort = sort frobnicate 1, 2;
+@sort = sort pyfg 1, 2;
+@sort = sort pyfgc 1, 2;
+no warnings;
+sub pyfg { undef }
+sub pyfgc($$) { undef }
+use warnings;
+sub dog {}
+sub dogwood($$) {}
+@sort = sort dog 1,2;
+@sort = sort dogwood 1,2;
EXPECT
Use of uninitialized value $m1 in sort at - line 6.
Use of uninitialized value $g1 in sort at - line 6.
Use of uninitialized value $g1 in sort at - line 6.
Use of uninitialized value $m1 in sort at - line 7.
Use of uninitialized value $g1 in sort at - line 7.
-Use of uninitialized value $m1 in sort at - line 7.
Use of uninitialized value $g1 in sort at - line 7.
+Use of uninitialized value $m1 in sort at - line 7.
Use of uninitialized value $a in subtraction (-) at - line 8.
Use of uninitialized value $b in subtraction (-) at - line 8.
Use of uninitialized value $m1 in sort at - line 9.
Use of uninitialized value $m1 in sort at - line 9.
Use of uninitialized value $g1 in sort at - line 9.
Use of uninitialized value $g1 in sort at - line 9.
+Use of uninitialized value in sort at - line 10.
+Use of uninitialized value in sort at - line 12.
+Use of uninitialized value in sort at - line 13.
+Use of uninitialized value in sort at - line 14.
+Use of uninitialized value in sort at - line 21.
+Use of uninitialized value in sort at - line 22.
+########
+use Config;
+unless ($Config{d_double_has_inf} && $Config{d_double_has_nan}) {
+ print <<EOM ;
+SKIPPED
+# No inf/nan support
+EOM
+ exit ;
+}
+my $nan = eval 'sin 9**9**9';
+if ($nan == $nan) {
+ print <<EOM ;
+SKIPPED
+# No nan support
+EOM
+ exit ;
+}
+use warnings 'uninitialized';
+# The optimised {$a<=>$b} case should behave the same way as unoptimised.
+@sort = sort { ($a)[0] <=> $b } 1, $nan;
+@sort = sort { $a <=> $b } 1, $nan;
+EXPECT
+Use of uninitialized value in sort at - line 19.
+Use of uninitialized value in sort at - line 20.
########
use warnings 'uninitialized';
my ($m1, $m2, $v);
Use of uninitialized value $m1 in subtraction (-) at - line 20.
########
use warnings 'uninitialized';
+sub TIESCALAR{bless[]}
+sub FETCH { undef }
+
+tie my $m1, "";
+my $v;
+$v = $m1 + $m1;
+$v = $m1 - $m1;
+no warnings;
+$v = $m1 + $m1;
+$v = $m1 - $m1;
+EXPECT
+Use of uninitialized value $m1 in addition (+) at - line 7.
+Use of uninitialized value $m1 in addition (+) at - line 7.
+Use of uninitialized value $m1 in subtraction (-) at - line 8.
+Use of uninitialized value $m1 in subtraction (-) at - line 8.
+########
+use warnings 'uninitialized';
my ($m1, $v);
our ($g1);
s//$g1/; undef $_;
s/$m1/$g1/; undef $_;
tr/x/y/; undef $_;
-
-my $_;
-/y/;
-/$m1/;
-/$g1/;
-s/y/z/; undef $_;
-s/$m1/z/; undef $_;
-s//$g1/; undef $_;
-s/$m1/$g1/; undef $_;
-tr/x/y/; undef $_;
+tr/x/y/r; undef $_;
$g2 =~ /y/;
$g2 =~ /$m1/;
$g2 =~ s//$g1/; undef $g2;
$g2 =~ s/$m1/$g1/; undef $g2;
$g2 =~ tr/x/y/; undef $g2; # XXX can't extract var name yet
+$g2 =~ tr/x/y/r; undef $g2; # XXX can't extract var name yet
my $foo = "abc";
$foo =~ /$m1/;
$foo =~ s//$g1/;
$foo =~ s/$m1/$g1/;
$foo =~ s/./$m1/e;
+undef $g1;
+$m1 = '$g1';
+$foo =~ s//$m1/ee;
+undef $m1;
+$m1 =~ tr/x/y/; undef $m1;
+$m1 =~ tr/x/y/r;
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 $_ in substitution (s///) at - line 10.
Use of uninitialized value $_ in substitution (s///) at - line 10.
Use of uninitialized value $_ in substitution (s///) at - line 11.
-Use of uninitialized value $g1 in substitution (s///) at - line 11.
Use of uninitialized value $_ in substitution (s///) at - line 11.
-Use of uninitialized value $g1 in substitution (s///) at - line 11.
+Use of uninitialized value $g1 in substitution iterator at - line 11.
Use of uninitialized value $m1 in regexp compilation at - line 12.
Use of uninitialized value $_ in substitution (s///) at - line 12.
Use of uninitialized value $_ in substitution (s///) at - line 12.
Use of uninitialized value $g1 in substitution iterator at - line 12.
Use of uninitialized value $_ in transliteration (tr///) at - line 13.
-Use of uninitialized value $_ in pattern match (m//) at - line 16.
+Use of uninitialized value $_ in transliteration (tr///) at - line 14.
+Use of uninitialized value $g2 in pattern match (m//) at - line 16.
Use of uninitialized value $m1 in regexp compilation at - line 17.
-Use of uninitialized value $_ in pattern match (m//) at - line 17.
+Use of uninitialized value $g2 in pattern match (m//) at - line 17.
Use of uninitialized value $g1 in regexp compilation at - line 18.
-Use of uninitialized value $_ in pattern match (m//) at - line 18.
-Use of uninitialized value $_ in substitution (s///) at - line 19.
+Use of uninitialized value $g2 in pattern match (m//) at - line 18.
+Use of uninitialized value $g2 in substitution (s///) at - line 19.
Use of uninitialized value $m1 in regexp compilation at - line 20.
-Use of uninitialized value $_ in substitution (s///) at - line 20.
-Use of uninitialized value $_ in substitution (s///) at - line 20.
-Use of uninitialized value $_ in substitution (s///) at - line 21.
-Use of uninitialized value $g1 in substitution (s///) at - line 21.
-Use of uninitialized value $_ in substitution (s///) at - line 21.
-Use of uninitialized value $g1 in substitution (s///) at - line 21.
+Use of uninitialized value $g2 in substitution (s///) at - line 20.
+Use of uninitialized value $g2 in substitution (s///) at - line 20.
+Use of uninitialized value $g2 in substitution (s///) at - line 21.
+Use of uninitialized value $g2 in substitution (s///) at - line 21.
+Use of uninitialized value $g1 in substitution iterator at - line 21.
Use of uninitialized value $m1 in regexp compilation at - line 22.
-Use of uninitialized value $_ in substitution (s///) at - line 22.
-Use of uninitialized value $_ in substitution (s///) at - line 22.
+Use of uninitialized value $g2 in substitution (s///) at - line 22.
+Use of uninitialized value $g2 in substitution (s///) at - line 22.
Use of uninitialized value $g1 in substitution iterator at - line 22.
-Use of uninitialized value $_ in transliteration (tr///) at - line 23.
-Use of uninitialized value $g2 in pattern match (m//) at - line 25.
-Use of uninitialized value $m1 in regexp compilation at - line 26.
-Use of uninitialized value $g2 in pattern match (m//) at - line 26.
-Use of uninitialized value $g1 in regexp compilation at - line 27.
-Use of uninitialized value $g2 in pattern match (m//) at - line 27.
-Use of uninitialized value $g2 in substitution (s///) at - line 28.
-Use of uninitialized value $m1 in regexp compilation at - line 29.
-Use of uninitialized value $g2 in substitution (s///) at - line 29.
-Use of uninitialized value $g2 in substitution (s///) at - line 29.
-Use of uninitialized value $g2 in substitution (s///) at - line 30.
-Use of uninitialized value $g1 in substitution (s///) at - line 30.
-Use of uninitialized value $g2 in substitution (s///) at - line 30.
-Use of uninitialized value $g1 in substitution (s///) at - line 30.
-Use of uninitialized value $m1 in regexp compilation at - line 31.
-Use of uninitialized value $g2 in substitution (s///) at - line 31.
-Use of uninitialized value $g2 in substitution (s///) at - line 31.
+Use of uninitialized value in transliteration (tr///) at - line 23.
+Use of uninitialized value in transliteration (tr///) at - line 24.
+Use of uninitialized value $m1 in regexp compilation at - line 27.
+Use of uninitialized value $g1 in regexp compilation at - line 28.
+Use of uninitialized value $m1 in regexp compilation at - line 30.
Use of uninitialized value $g1 in substitution iterator at - line 31.
-Use of uninitialized value in transliteration (tr///) at - line 32.
-Use of uninitialized value $m1 in regexp compilation at - line 35.
-Use of uninitialized value $g1 in regexp compilation at - line 36.
-Use of uninitialized value $m1 in regexp compilation at - line 38.
-Use of uninitialized value $g1 in substitution (s///) at - line 39.
-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 $m1 in regexp compilation at - line 32.
+Use of uninitialized value $g1 in substitution iterator at - line 32.
+Use of uninitialized value $m1 in substitution (s///) at - line 33.
+Use of uninitialized value in substitution iterator at - line 36.
+Use of uninitialized value $m1 in transliteration (tr///) at - line 38.
+Use of uninitialized value $m1 in transliteration (tr///) at - line 39.
########
use warnings 'uninitialized';
my ($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 $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 6.
Use of uninitialized value $g1 in substr at - line 6.
Use of uninitialized value $m1 in substr at - line 6.
-Use of uninitialized value $g2 in substr at - line 7.
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 $g2 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 $g2 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 $m2 in substr at - line 9.
Use of uninitialized value $g1 in substr at - line 9.
+Use of uninitialized value $g2 in substr at - line 9.
Use of uninitialized value $m1 in substr at - line 9.
-Use of uninitialized value in scalar assignment at - line 9.
Use of uninitialized value $m2 in vec at - line 11.
Use of uninitialized value $g1 in vec at - line 11.
Use of uninitialized value $m1 in vec at - line 11.
Use of uninitialized value $m2 in vec at - line 12.
Use of uninitialized value $g1 in vec at - line 12.
-Use of uninitialized value $m1 in vec at - line 12.
Use of uninitialized value $m1 in index at - line 14.
Use of uninitialized value $m2 in index at - line 14.
Use of uninitialized value $g1 in index at - line 15.
Use of uninitialized value $g1 in formline at - line 8.
Use of uninitialized value $g2 in formline at - line 8.
########
+# SKIP ? !$Config{d_crypt}
use warnings 'uninitialized';
my ($m1, $v);
our ($g1);
$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);
Use of uninitialized value $g1 in split at - line 8.
Use of uninitialized value $m2 in split at - line 8.
Use of uninitialized value $m1 in join or string at - line 10.
-Use of uninitialized value $m1 in join or string at - line 11.
Use of uninitialized value $m2 in join or string at - line 11.
Use of uninitialized value $m1 in join or string at - line 12.
Use of uninitialized value $m2 in join or string at - line 12.
my @foo4=(1,undef); chop @foo4;
our @foo5=(1,undef); $v = sprintf "%s%s",@foo5;
my @foo6=(1,undef); $v = sprintf "%s%s",@foo6;
-our %foo7=('foo'=>'bar','baz'=>undef); $v = sprintf "%s%s",%foo7;
-my %foo8=('foo'=>'bar','baz'=>undef); $v = sprintf "%s%s",%foo8;
+our %foo7=('foo'=>'bar','baz'=>undef); $v = sprintf "%s%s%s%s",%foo7;
+my %foo8=('foo'=>'bar','baz'=>undef); $v = sprintf "%s%s%s%s",%foo8;
our @foo9 =(1,undef); $v = sprintf "%s%s%s%s",$m1,@foo9, $ma[2];
my @foo10=(1,undef); $v = sprintf "%s%s%s%s",$m2,@foo10,$ma[2];
our %foo11=('foo'=>'bar','baz'=>undef); $v = join '', %foo11;
my ($v);
# check hash key is sanitised
-my %h = ("\0011\002\r\n\t\f\"\\abcdefghijklmnopqrstuvwxyz", undef);
+my %h = ("\0011\002\r\n\t\f\"\\\x{1234}abcdefghijklmnopqrstuvwxyz", undef);
$v = join '', %h;
EXPECT
-Use of uninitialized value $h{"\0011\2\r\n\t\f\"\\abcdefghijklm"...} in join or string at - line 6.
+Use of uninitialized value $h{"\0011\2\r\n\t\f\"\\\x{1234}abcde"...} in join or string at - line 6.
########
use warnings 'uninitialized';
my ($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 $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';
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 -t at - line 34.
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 $_ in eval "string" at - line 4.
-Use of uninitialized value UTF8?'':'$_ 'in eval "string" at - line 4.
-Use of uninitialized value $m1 in eval "string" at - line 5.
Use of uninitialized value $m1 in eval "string" at - line 5.
-Use of uninitialized value UTF8?'':'$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'; no warnings 'experimental::smartmatch';
+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 = $Foo::BAR + 42;
+__END__
+EXPECT
+Use of uninitialized value in addition (+) at - line 3.
+########
+use warnings 'uninitialized';
+use constant {u=>undef, v=>undef};
+sub foo () {u}
+sub foo () {v}
+EXPECT
+########
+# [perl #72090]
+use warnings 'uninitialized';
+$a = @$a > 0;
+EXPECT
+Use of uninitialized value $a in array dereference at - line 3.
+Use of uninitialized value in numeric gt (>) at - line 3.
+########
+# [perl #103766]
+use warnings 'uninitialized';
+"@{[ $x ]}";
+EXPECT
+Use of uninitialized value in join or string at - line 3.
+########
+# inside formats
+use warnings 'uninitialized';
+my $x;
+format =
+@
+"$x";
+.
+write;
+EXPECT
+Use of uninitialized value $x in string at - line 6.
+########
+# NAME off-by-one error in hash bucket walk in key detection logic
+use warnings 'uninitialized';
+
+for ( 0 .. 20 ) { # we assume that this means we test keys for every bucket
+ my %h= ( $_ => undef );
+ my $s= sprintf "%s", $h{$_};
+}
+EXPECT
+Use of uninitialized value $h{"0"} in sprintf at - line 5.
+Use of uninitialized value $h{"1"} in sprintf at - line 5.
+Use of uninitialized value $h{"2"} in sprintf at - line 5.
+Use of uninitialized value $h{"3"} in sprintf at - line 5.
+Use of uninitialized value $h{"4"} in sprintf at - line 5.
+Use of uninitialized value $h{"5"} in sprintf at - line 5.
+Use of uninitialized value $h{"6"} in sprintf at - line 5.
+Use of uninitialized value $h{"7"} in sprintf at - line 5.
+Use of uninitialized value $h{"8"} in sprintf at - line 5.
+Use of uninitialized value $h{"9"} in sprintf at - line 5.
+Use of uninitialized value $h{"10"} in sprintf at - line 5.
+Use of uninitialized value $h{"11"} in sprintf at - line 5.
+Use of uninitialized value $h{"12"} in sprintf at - line 5.
+Use of uninitialized value $h{"13"} in sprintf at - line 5.
+Use of uninitialized value $h{"14"} in sprintf at - line 5.
+Use of uninitialized value $h{"15"} in sprintf at - line 5.
+Use of uninitialized value $h{"16"} in sprintf at - line 5.
+Use of uninitialized value $h{"17"} in sprintf at - line 5.
+Use of uninitialized value $h{"18"} in sprintf at - line 5.
+Use of uninitialized value $h{"19"} in sprintf at - line 5.
+Use of uninitialized value $h{"20"} in sprintf at - line 5.
+########
+# NAME SvPOK && SvLEN==0 should not produce uninit warning
+use warnings 'uninitialized';
+
+$v = int(${qr||}); # sv_2iv on a regexp
+$v = 1.1 * ${qr||}; # sv_2nv on a regexp
+$v = ${qr||} << 2; # sv_2uv on a regexp
+
+sub TIESCALAR{bless[]}
+sub FETCH {${qr||}}
+tie $t, "";
+$v = 1.1 * $t; # sv_2nv on a tied regexp
+
+EXPECT
+########
+# multi-level uninitialised array/hash indexes
+use warnings 'uninitialized';
+
+our ($i0, $i2, $i4, $i6, $i8, $i10, $i12);
+my ($i1, $i3, $i5, $i7, $i9, $i11, $i13);
+
+my (@a,%h);
+my $v;
+
+
+# use enough depth that OP_MULTIDEREF needs more than one action word
+
+$v = $a[$i0]{$i1}[$i2]{$i3}[$i4]{$i5}[$i6]{$i7}[$i8]{$i9}[$i10]{$i11}[$i12]{$i13};
+$v = $h{$i0}[$i1]{$i2}[$i3]{$i4}[$i5]{$i6}[$i7]{$i8}[$i9]{$i10}[$i11]{$i12}[$i13];
+
+EXPECT
+Use of uninitialized value $i0 in array element at - line 13.
+Use of uninitialized value $i1 in hash element at - line 13.
+Use of uninitialized value $i2 in array element at - line 13.
+Use of uninitialized value $i3 in hash element at - line 13.
+Use of uninitialized value $i4 in array element at - line 13.
+Use of uninitialized value $i5 in hash element at - line 13.
+Use of uninitialized value $i6 in array element at - line 13.
+Use of uninitialized value $i7 in hash element at - line 13.
+Use of uninitialized value $i8 in array element at - line 13.
+Use of uninitialized value $i9 in hash element at - line 13.
+Use of uninitialized value $i10 in array element at - line 13.
+Use of uninitialized value $i11 in hash element at - line 13.
+Use of uninitialized value $i12 in array element at - line 13.
+Use of uninitialized value $i13 in hash element at - line 13.
+Use of uninitialized value $i0 in hash element at - line 14.
+Use of uninitialized value $i1 in array element at - line 14.
+Use of uninitialized value $i2 in hash element at - line 14.
+Use of uninitialized value $i3 in array element at - line 14.
+Use of uninitialized value $i4 in hash element at - line 14.
+Use of uninitialized value $i5 in array element at - line 14.
+Use of uninitialized value $i6 in hash element at - line 14.
+Use of uninitialized value $i7 in array element at - line 14.
+Use of uninitialized value $i8 in hash element at - line 14.
+Use of uninitialized value $i9 in array element at - line 14.
+Use of uninitialized value $i10 in hash element at - line 14.
+Use of uninitialized value $i11 in array element at - line 14.
+Use of uninitialized value $i12 in hash element at - line 14.
+Use of uninitialized value $i13 in array element at - line 14.
+########
+# misc multideref
+use warnings 'uninitialized';
+my ($i,$j,$k);
+my @a;
+my @ra = \@a;
+my $v;
+$v = exists $a[$i]{$k};
+$v = delete $a[$i]{$k};
+$v = local $a[$i]{$k};
+delete $a[$i]{$k};
+$v = $ra->[$i+$j]{$k};
+$v = ($ra//0)->[$i]{$k};
+$v = $a[length $i]{$k}
+EXPECT
+Use of uninitialized value $i in array element at - line 7.
+Use of uninitialized value $k in exists at - line 7.
+Use of uninitialized value $i in array element at - line 8.
+Use of uninitialized value $k in delete at - line 8.
+Use of uninitialized value $i in array element at - line 9.
+Use of uninitialized value $k in hash element at - line 9.
+Use of uninitialized value $k in hash element at - line 9.
+Use of uninitialized value $k in hash element at - line 9.
+Use of uninitialized value $i in array element at - line 10.
+Use of uninitialized value $k in delete at - line 10.
+Use of uninitialized value $j in addition (+) at - line 11.
+Use of uninitialized value $i in addition (+) at - line 11.
+Use of uninitialized value $k in hash element at - line 11.
+Use of uninitialized value $i in array element at - line 12.
+Use of uninitialized value $k in hash element at - line 12.
+Use of uninitialized value $i in array element at - line 13.
+Use of uninitialized value $k in hash element at - line 13.
+########
+# perl #127877
+use warnings 'uninitialized';
+my ($p, $q, $r, $s, $t, $u, $v, $w, $x, $y);
+$p = $p . "a";
+$q .= "a";
+$r = $r + 17;
+$s += 17;
+$t = $t - 17;
+$u -= 17;
+use integer;
+$v = $v + 17;
+$w += 17;
+$x = $x - 17;
+$y -= 17;
+EXPECT
+Use of uninitialized value $p in concatenation (.) or string at - line 4.
+Use of uninitialized value $r in addition (+) at - line 6.
+Use of uninitialized value $t in subtraction (-) at - line 8.
+Use of uninitialized value $v in integer addition (+) at - line 11.
+Use of uninitialized value $x in integer subtraction (-) at - line 13.
+########
+# NAME 64-bit array subscripts
+# SKIP ? length(pack "p", "") < 8
+use warnings 'uninitialized';
+
+# aelem + const
+use constant foo => \0;
+$SIG{__WARN__} = sub {
+ print STDERR
+ $_[0] =~ /\$a\[([^]]+)]/ && $1 == foo
+ ? "ok\n"
+ : ("$1 != ",0+foo,"\n")
+};
+() = "$a[foo]";
+undef $SIG{__WARN__};
+
+# Multideref
+() = "$a[140688675223280]";
+EXPECT
+ok
+Use of uninitialized value $a[140688675223280] in string at - line 15.
+########
+# RT #128940
+use warnings 'uninitialized';
+my $x = "" . open my $fh, "<", "no / such / file";
+EXPECT
+Use of uninitialized value in concatenation (.) or string at - line 3.
+########
+# RT #123910
+# undef's arg being undef doesn't trigger warnings - any warning will be
+# from tied/magic vars
+use warnings 'uninitialized';
+undef $0;
+EXPECT
+Use of uninitialized value in undef operator at - line 5.
https://perl5.git.perl.org / perl5.git / blobdiff