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use strict;
my $v = 'x';
...
__END__
Global symbol "%v" requires explicit package name at rhesa1.pl line 3.
Execution of rhesa1.pl aborted due to compilation errors.

use strict;
my $v = 'x';
...
__END__
Global symbol "%v" requires explicit package name at rhesa3.pl line 3.
Execution of rhesa3.pl aborted due to compilation errors.

use strict;
my $v = 'x';
print "$v\{a\}";
__END__
x{a}