#!./perl
BEGIN {
    chdir 't' if -d 't';
    require './test.pl';
    set_up_inc( qw(. ../lib) );
}
plan( tests => 20 );
use strict;
use warnings;
our @warnings;
BEGIN {
    $SIG{'__WARN__'} = sub { push @warnings, @_ };
    $| = 1;
}
my $fail_odd      = 'Odd number of elements in hash assignment at ';
my $fail_odd_anon = 'Odd number of elements in anonymous hash at ';
my $fail_ref      = 'Reference found where even-sized list expected at ';
my $fail_not_hr   = 'Not a HASH reference at ';
{
    @warnings = ();
    my %hash = (1..3);
    cmp_ok(scalar(@warnings),'==',1,'odd count');
    cmp_ok(substr($warnings[0],0,length($fail_odd)),'eq',$fail_odd,'odd msg');
    @warnings = ();
    %hash = 1;
    cmp_ok(scalar(@warnings),'==',1,'scalar count');
    cmp_ok(substr($warnings[0],0,length($fail_odd)),'eq',$fail_odd,'scalar msg');
    @warnings = ();
    %hash = { 1..3 };
    cmp_ok(scalar(@warnings),'==',2,'odd hashref count');
    cmp_ok(substr($warnings[0],0,length($fail_odd_anon)),'eq',$fail_odd_anon,'odd hashref msg 1');
    cmp_ok(substr($warnings[1],0,length($fail_ref)),'eq',$fail_ref,'odd hashref msg 2');
    @warnings = ();
    %hash = [ 1..3 ];
    cmp_ok(scalar(@warnings),'==',1,'arrayref count');
    cmp_ok(substr($warnings[0],0,length($fail_ref)),'eq',$fail_ref,'arrayref msg');
    @warnings = ();
    %hash = sub { print "fenice" };
    cmp_ok(scalar(@warnings),'==',1,'coderef count');
    cmp_ok(substr($warnings[0],0,length($fail_odd)),'eq',$fail_odd,'coderef msg');
    # GH #21478
    @warnings = ();
    my $hashref = { 1 };
    is(scalar(@warnings), 1, 'anon singleton count');
    is(substr($warnings[0], 0, length($fail_odd_anon)), $fail_odd_anon, 'anon singleton msg');
    @warnings = ();
    $_ = { 1..10 };
    cmp_ok(scalar(@warnings),'==',0,'hashref assign');
    # Old pseudo-hash syntax, now removed.
    @warnings = ();
    my $avhv = [{x=>1,y=>2}];
    eval {
        %$avhv = (x=>13,'y');
    };
    cmp_ok(scalar(@warnings),'==',0,'pseudo-hash 1 count');
    cmp_ok(substr($@,0,length($fail_not_hr)),'eq',$fail_not_hr,'pseudo-hash 1 msg');
    @warnings = ();
    eval {
        %$avhv = 'x';
    };
    cmp_ok(scalar(@warnings),'==',0,'pseudo-hash 2 count');
    cmp_ok(substr($@,0,length($fail_not_hr)),'eq',$fail_not_hr,'pseudo-hash 2 msg');
}
# RT #128189
# this used to coredump
{
    @warnings = ();
    my %h;
    no warnings;
    use warnings qw(uninitialized);
    my $x = "$h{\1}";
    is(scalar @warnings, 1, "RT #128189 - 1 warning");
    like("@warnings",
        qr/Use of uninitialized value \$h\{"SCALAR\(0x[\da-f]+\)"\}/,
        "RT #128189 correct warning");
}