Update of bug#65138 (group groff):
Item Group: Warning/Suspicious behaviour => Documentation
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Follow-up Comment #1:
A partially collected line needs to exist at least once. If it does, you can
issue a `device` request as early as you want.
So I am re-conceiving this as a documentation issue.
Exhibits:
$ cat EXPERIMENTS/device-control-request-and-nothing-else.roff
.device ps: nop
$ groff -ww -Z EXPERIMENTS/device-control-request-and-nothing-else.roff
x T ps
x res 72000 1 1
x init
p1
x trailer
V792000
x stop
$ cat EXPERIMENTS/device-control-request-and-partially-collected-line.roff
.device ps: nop
.br
$ groff -ww -Z
EXPERIMENTS/device-control-request-and-partially-collected-line.roff
x T ps
x res 72000 1 1
x init
p1
V12000
H72000
x font 5 TR
f5
s10000
V12000
H72000
md
DFd
x X ps: nop
n12000 0
x trailer
V792000
x stop
-verbatim-
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