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Re: [bug #61531] Error when compiling and running ncurses tutorial examp

From: Patrick CLOAREC
Subject: Re: [bug #61531] Error when compiling and running ncurses tutorial example menu.e
Date: Tue, 8 Mar 2022 12:18:28 +0100
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2

Right, the analysis is not finished, I have to dig in ncurses and XPG4 spec to ensure we are doing the right things.

I've been very busy for the last weeks, and I am still busy, so I just wrote down my findings before the next step : finding the correct references to ensure a correct interpretation.

Actually, the "maximum coordinates" issue is an obvious problem in ncurses, but there are more issues in dealing with subwindows. Moving a window does not move its subwindow, moving a subwindow leads to a duplication of its content....

As far as I know, "curses" find its origin in System V and is specified by the Open group (, and ncurses ( is supposed to be compliant with it. I presume ncurses is quite flawed for some features (and some comments on the internet show I am not the only one), and it is sometimes closer to a Pandora box than to a library.

For this specific bug, the solution I suggest seems to be enough, but I wouldn't try to have a full text window library relying on ncurses.

Le 07/03/2022 à 22:37, Raphael Mack a écrit :
Follow-up Comment #3, bug #61531 (project liberty-eiffel):

Thanks for this detailed analysis! So we should change the wrapper code
accordingly. But is it also our duty to check with upstream ncurses project as
the docs seem inconsistent and we'd need to adjust it again if the behavior is


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