map syntax error -- weird

[Anonymous Monk]

Hello there, dear Perl Monks,

I'm not sure if this is a know bug, but it's very weird.

my %opt;
my @vals = qw(title artist album);
my @opts = map { "$_=s" => \$opt{$_} } @vals;

It says:

Not enough arguments for map at test.pl line 3, near "} @vals"
syntax error at test.pl line 3, near "} @vals"
Execution of test.pl aborted due to compilation errors.

It can be very easy reproduced:

map { "x" => $y } qw(1 2 3);

and says:

Not enough arguments for map at test.pl line 1, near "} qw(1 2 3)"
syntax error at test.pl line 1, near "} qw(1 2 3)"
Execution of test.pl aborted due to compilation errors.

Any thought on this issue is appreciated. Thank you very much.