On Fri, Feb 13, 2026 at 08:50:20AM +0100, Lars Wendler wrote: > Am Thu, 12 Feb 2026 15:23:30 -0500 > schrieb Thomas Dickey <[email protected]>: > > > On Thu, Feb 12, 2026 at 04:03:01PM +0100, Lars Wendler wrote: > > > Hi, > > > > > > ncurses-6.6-20260131 and ncurses-6.6-20260207 are breaking tmux. > > > Once I try to start new tmux in a freshly opened terminal I get the > > > following error message: > > > > > > > tmux > > > missing or unsuitable terminal: xterm-256color > > > > > > > > > > Downgrading ncurses to 6.6-20260124 or older "fixes" the issue. > > > > The changes in 20260131 were all additions to existing terminal > > descriptions. Nothing was removed. > > > > The report doesn't say how ncurses was built or installed. > > > > (there's nothing that demonstrates a problem with ncurses or tmux) > > > > Hi Thomas, > > yeah sorry for such a bad report. Unfortunately I cannot give much more > information about this issue. > > tmux simply won't start at all with >=ncurses-6.6-20260131 and the only > "error message" one gets is the one I showed in my previous mail. > > ncurses was built the same way previous working versions were built.
I don't see any clues regarding how it was built, nor even what system you are using. https://invisible-island.net/personal/bug-reports.html > I found a bug report in the tmux repo but that one was closed without a > real fix because the reporter didn't respond in time: > > https://github.com/tmux/tmux/issues/4844 > > Ultimately I just want to raise awareness that there's an issue with > recent ncurses patch sets. Sorry for not being of more help here. > > Kind regards > Lars > -- Thomas E. Dickey <[email protected]> https://invisible-island.net
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