GNU roff - Bugs: bug #64308, [troff] should warn of negative...

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bug #64308: [troff] should warn of negative arguments to \D'{c,e,E}' drawing commands

Submitter:	G. Branden Robinson <gbranden>
Submitted:	Fri 16 Jun 2023 03:36:00 AM UTC


Category:	Core	Severity:	3 - Normal
Item Group:	Warning/Suspicious behaviour	Status:	None
Privacy:	Public	Assigned to:	None
Open/Closed:	Open	Planned Release:	None

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Sun 18 Jun 2023 01:15:33 AM UTC, comment #2: comment #1: > The graphics functions are still not understood. I'm working on that. > The claim, hypothesis, theory or imagination have not be confirmed by > a real experiment. You can always perform experiments yourself, as I do...	G. Branden Robinson <gbranden>
Sat 17 Jun 2023 05:33:16 PM UTC, comment #1: The graphics functions are still not understood. The claim, hypothesis, theory or imagination have not be confirmed by a real experiment.	Bjarni Ingi Gislason <bjarniig>
Fri 16 Jun 2023 03:36:00 AM UTC, original submission: It doesn't make any sense for a circle to have a negative diameter or an ellipse to have axes of negative length. Yet GNU troff accepts this and happily delivers this nonsense to output drivers. It should not. $ groff -Z \D'e -5 -2' <Control+D> x T ps x res 72000 1 1 x init p1 V12000 H72000 md DFd s10000 De -50000 -24000 n12000 0 x trailer V792000 x stop $ groff -Z \D'c -10' <Control+D> x T ps x res 72000 1 1 x init p1 V12000 H72000 md DFd s10000 Dc -100000 n12000 0 x trailer V792000 x stop	G. Branden Robinson <gbranden>

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GNU roff - Bugs: bug #64308, [troff] should warn of negative...

bug #64308: [troff] should warn of negative arguments to \D'{c,e,E}' drawing commands

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