Follow-up Comment #1, bug #64155 (project groff):
I suspect this is related to bug #64144 (errors when setting -f to a font
which does not contain a full latin-1 character set). It occurs when using .if
''' in a macro so a construct such as .if '\*[.T]'html' will fail when troff
generates the output of both to compare.
Branden devised an ingenious solution in bug #64144, it is a bit odd because
-T pdf produces a different error:-
[derij@pip build (new-gropdf)]$ echo ' ' | ./test-groff -Tps -fEURO -a
troff: fatal error: invalid default font family 'EURO'
[derij@pip build (new-gropdf)]$ echo ' ' | ./test-groff -Tpdf -fEURO -a
troff: fatal error: invalid default font family 'EURO'
[derij@pip build (new-gropdf)]$ echo ' ' | ./test-groff -Tpdf -fZD -a
troff: fatal error: invalid default font family 'ZD'
[derij@pip build (new-gropdf)]$ echo ' ' | ./test-groff -Tps -fZD -a
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:14: warning:
character 'p' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:14: warning:
character 's' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:14: warning:
character 'a' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:14: warning:
character 'c' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:14: warning:
character 'i' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:16: warning:
character 'l' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:16: warning:
character 't' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:16: warning:
character 'n' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:17: warning:
character 'u' not defined
troff:/home/derij/groff-git/groff/build/../tmac/fallbacks.tmac:17: warning:
character 'f' not defined
troff:/home/derij/groff-git/groff/build/../tmac/troffrc-end:7: warning:
character 'h' not defined
troff:/home/derij/groff-git/groff/build/../tmac/troffrc-end:7: warning:
character 'm' not defined
<beginning of page>
troff:/home/derij/groff-git/groff/build/../tmac/html-end.tmac:20: error:
numeric overflow
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