[bug #44018] [PATCH] gtroff hangs in environment::possibly_break_line with -mja

[G. Branden Robinson]

Follow-up Comment #6, bug #44018 (project groff):


commit bcdf2f4c7c28328c711c6a7ac2ea17f2ecd5cdd4
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Wed Oct 21 00:29:24 2020 +1100

    src/roff/troff/env.cpp: Avoid infinite loop.
    
    * src/roff/troff/env.cpp (environment::possibly_break_line): Emit break
      warning and return if the output width is not positive.  The code
      assumes that it will be and loops infinitely if it isn't.  I _think_
      this is because we're not able to get width data for (some?) CJK
      glyphs.  Based on a patch by Osamu Sayama.
    
    Fixes <https://savannah.gnu.org/bugs/index.php?44018>.

commit 7964eb52debd3f09ce9125ca063c742448854fa8
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
Date:   Wed Oct 21 00:39:39 2020 +1100

    Add regression test for Savannah #44018.
    
    Warning: "make check" will loop infinitely at this commit.




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