I've found another symptom of the problem. It has something to do with the handling of the TSTP signal (normally sent by typing Ctrl-Z).
Running bash 4.4-beta, I type the "cat" command. While "cat" is running, I type Ctrl-Z. Normally this should suspend the "cat" process and give me a shell prompt, but nothing visible happens. Normally I can achieve the same effect by running "kill -TSTP PID", where PID is the process id of the "cat" process, from another terminal. This also does nothing. I *can* suspend the "cat" process by typing "kill -STOP PID" from another terminal. After doing that, I can restore it by typing "fg" at the bash prompt (but Ctrl-Z still doesn't work). This problem occurs with bash 4.4-beta on Debian 6.0.10. It does not occur with bash 4.4-beta on Linux Mint 17.2, or with bash 4.3.30 on Debian 6.0.10. On Wed, Oct 28, 2015 at 7:02 PM, Keith Thompson <keithsthomp...@gmail.com> wrote: > I'm running bash 4.4-beta, built from bash-4.4-beta.tar.gz, on two > different x86_64 systems, one running Debian 6.0.10 and another running > Linux Mint 17.3. > > On both systems, if I run "man rm" (for example) I can read the "rm(1)" > man page using "less" (my $MANPAGER is set to "less -s -r"). If I then > type Ctrl-Z, the "man" and "pager" processes are suspended and the screen > is restored its previous state. > > On the Debian system, I don't get a new shell prompt (this is the > bug). The terminal continues to accept and echo input, but it's otherwise > stuck. Ctrl-C and Ctrl-Z are echoed as "^C" and "^Z", but are otherwise > ignored. I can recover by killing the "man" process from another window. > > On the Linux Mint system, this problem does not occur. Typing Ctrl-Z > gives me a new shell prompt, and the "man rm" process shows up in the > "jobs" listing. > > The problem does not occur on Debian 6 using /bin/bash (version 4.1.5). > > I don't see the problem when I invoke "less" or "vi" directly. I've > seen the problem when I'm in an editor (vim) invoked from "git commit". > So apparently it has something to do with a full-screen program invoked > by some other program. > > Let me know if I can provide more information (Debian 6 is fairly old, so > you might not have a running copy). > > -- > Keith Thompson <keith.s.thomp...@gmail.com> > -- Keith Thompson <keith.s.thomp...@gmail.com>
