title: Can't locate DBI.pm in @INC (you may need to install the DBI module)
body: <p>I want to use the Defects4j dataset,when I do this follow the page of github: 
   <a href="https://github.com/rjust/defects4j" rel="nofollow noreferrer">https://github.com/rjust/defects4j</a></p>
  
  <pre><code>$ defects4j checkout Lang
  Can't locate DBI.pm in @INC
     (you may need to install the DBI module)
     (@INC contains:
     /c/Users/Liu Fang/defects4j/framework/lib
     /c/Users/Liu Fang/defects4j/framework
     /c/Users/Liu Fang/defects4j/framework/core
     /c/Users/Liu Fang/defects4j/framework/core
     /usr/lib/perl5/site_perl
     /usr/share/perl5/site_perl
     /usr/lib/perl5/vendor_perl
     /usr/share/perl5/vendor_perl 
     /usr/lib/perl5/core_perl
     /usr/share/perl5/core_perl .
     ) at /c/Users/Liu Fang/defects4j/framework/core/DB.pm line 43.
  </code></pre>
  
  <p>[Added line breaks for readability]</p>