I don't know why below error message(I add it in the comment) 

 
{
    package packageA
    my %hash_map = (
      "name" => "path",
      ......,
    );
    sub new{
      ........
    }
    sub get{
      my $class = shift;
      my $componentName = @_;
    
      my $path = $component_path{$componentName};
#error:
#Use of uninitialized value $path in pattern match (m//) at below...
        if($path =~ m/HKEY_LOCAL_MACHINE/){
            dosomthing;          
        }
    }
}

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In reply to Use of uninitialized value in pattern match (m//) by anaconda_wly

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