Follow-up Comment #3, bug #68558 (group groff): [comment #2 comment #2:] > Problem appears to date > back at least to groff 1.22.3 (2014), and possibly much earlier.
Less than 10 years earlier, FWIW. (1.19.2 dates to 2005.)
$ groff -v | head -1
GNU groff version 1.19.2
$ printf '.do \\a\n' | groff && echo exit success
<standard input>:1: name expected (got a node): treated as missing
exit success
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