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in reply to Re^2: Perl CGI.PM: Use of uninitialized value $vals
in thread Perl CGI.PM: Use of uninitialized value $vals

While you could certainly investigate and debug CGI.pm, you really shouldn't use -w on the shebang line (#!/usr/bin/perl -w) and use warnings; instead. See What's wrong with -w and $^W.

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Re^4: Perl CGI.PM: Use of uninitialized value $vals
by Anonymous Monk on Apr 30, 2018 at 14:37 UTC
    No, I don't have the -w. My shebang line is this: #!/usr/bin/perl -T
      No, I don't have the -w.

      Ah, good - sounds like the issue is somewhere else.