[bug #56555] I can make grotty core dump with 5 bytes of input

[G. Branden Robinson]

URL:
  <https://savannah.gnu.org/bugs/?56555>

                 Summary: I can make grotty core dump with 5 bytes of input
                 Project: GNU troff
            Submitted by: gbranden
            Submitted on: Wed 26 Jun 2019 03:51:56 PM UTC
                Category: Device - others
                Severity: 3 - Normal
              Item Group: Crash/Not responding
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

It's okay to give up on hopelessly corrupt input, but we shouldn't drop core.


$ nroff crash.nroff 
grotty:<standard input>:5: bad font position '-1'
groff: grotty: Signal 11 (core dumped)
$ od -c crash.nroff
0000000   \   !   t   r  \n
0000005





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