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From: gentoo_eshoes@tutanota.com
Newsgroups: gnu.bash.bug
Subject: Re: [PATCH] Add active mark, face support; activate mark on paste
Date: Sat, 11 Apr 2020 18:04:56 +0200 (CEST)
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Approved: bug-bash@gnu.org
Message-ID: <mailman.25.1586621107.3066.bug-bash@gnu.org>
References: <M4dFweU--3-2@tutanota.com> <875c423e-0420-78d2-af4b-dfb168432e2d@case.edu> <M4dz8wC--3-2@tutanota.com>
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Cc: bug-bash@gnu.org, chet.ramey@case.edu
To: Chet Ramey <chet.ramey@case.edu>
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In-Reply-To: <875c423e-0420-78d2-af4b-dfb168432e2d@case.edu>
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Xref: csiph.com gnu.bash.bug:16121




Apr 11, 2020, 17:19 by chet.ramey@case.edu:

> On 4/11/20 8:43 AM, gentoo_eshoes@tutanota.com wrote:
>
>> It silently segfaults when pasting a line of text twice(or a long enough=
 line once), seems to be length dependent, unsure.
>>
>> Removing commit ea31c00845c858098d232bd014bf27b5a63a668b from only the f=
ile lib/readline/display.c=C2=A0 works around the issue.
>>
>
> Well, sure, since that's the commit that adds the face changes to
> redisplay.
>
true, but my intent was to say that even though that commit also modifies o=
ther files(since it seems to be an aggregation of a bunch of commits with u=
nrelated-to-'face' changes inside it) I only reverted the changes in that f=
ile, as I've no idea in which other files those specific 'face' changes wer=
e. Anyway, it doesn't matter, but it does make bisecting a bit harder with =
regards to pinpointing the exact culprit.

commit ea31c00845c858098d232bd014bf27b5a63a668b
Date:=C2=A0=C2=A0 Wed Apr 8 17:09:56 2020 -0400

=C2=A0=C2=A0=C2=A0 commit bash-20200406 snapshot


>
> What's your $PS1?
>
$ echo $PS1
\ -----------\n\ \[\a\]\ \[\e[1;37m\e[42m\]\u@\H\[\e[0m\] \ \[\033[1;30m\]$=
(date "+%Y/%m/%d %H:%M:%S")\[\033[0m\] \ \[\e[0;37m\]\s\V t:\l j:\j \ d:${S=
HLVL} pp:${PPID} p:$$ ut`cat /proc/uptime | cut -f1 -d.`\[\e[0m\]\n\ \[\e[0=
;37m\]!\!\[\e[0m\] \ \[\033[0;36m\]\#\[\033[0m\] \ $(evalexitcode "${__earl=
yec[@]}" ) \ \[\e[0m\]$(uname -r) $(uname -v) $(ps_lepath "\w")\[ \033];\w\=
a\] \[\e[1;32m\]\$\[\e[0m\] \

$ echo ${PS1@A}
declare -x PS1=3D$'\\\n-----------\\n\\\n\\[\\a\\]\\\n\\[\\e[1;37m\\e[42m\\=
]\\u@\\H\\[\\e[0m\\] \\\n\\[\\033[1;30m\\]$(date "+%Y/%m/%d %H:%M:%S")\\[\\=
033[0m\\] \\\n\\[\\e[0;37m\\]\\s\\V t:\\l j:\\j \\\nd:${SHLVL} pp:${PPID} p=
:$$ ut`cat /proc/uptime | cut -f1 -d.`\\[\\e[0m\\]\\n\\\n\\[\\e[0;37m\\]!\\=
!\\[\\e[0m\\] \\\n\\[\\033[0;36m\\]\\#\\[\\033[0m\\] \\\n$(evalexitcode "${=
__earlyec[@]}" ) \\\n\\[\\e[0m\\]$(uname -r) $(uname -v)\n$(ps_lepath "\\w"=
)\\[ \\033];\\w\\a\\]\n\\[\\e[1;32m\\]\\$\\[\\e[0m\\] \\\n'

evalexitcode ()=20
{=20
=C2=A0=C2=A0=C2=A0 local ps=3D("$@");
=C2=A0=C2=A0=C2=A0 for i in "${ps[@]}";
=C2=A0=C2=A0=C2=A0 do
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if test "$i" -ne "0"; then
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 echo -ne=
 "\x01\e[1;31m\x02${i}\x01\e[0m\x02 ";
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 else
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 echo -ne=
 "\x01\e[1;30m\x02${i}\x01\e[0m\x02 ";
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 fi;
=C2=A0=C2=A0=C2=A0 done
}

ps_lepath ()=20
{=20
=C2=A0=C2=A0=C2=A0 local lepath=3D"$*";
=C2=A0=C2=A0=C2=A0 local lepath2=3D"${*#\~}";
=C2=A0=C2=A0=C2=A0 if test "$lepath" !=3D "$lepath2"; then
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 lepath=3D"$(realpath ~)${lepath2=
}";
=C2=A0=C2=A0=C2=A0 fi;
=C2=A0=C2=A0=C2=A0 printf %q "${PWD}"
}

$ echo $PROMPT_COMMAND
__earlyec=3D("${PIPESTATUS[@]}")
$ echo ${PROMPT_COMMAND@A}
declare -x PROMPT_COMMAND=3D'__earlyec=3D("${PIPESTATUS[@]}")'

/usr/bin/cat is owned by coreutils 8.32-1
/usr/bin/uname is owned by coreutils 8.32-1
/usr/bin/date is owned by coreutils 8.32-1


>> Please someone tell me how to disable bash's trapping of SIGSEGV so that=
 the OS is allowed to generate a proper coredump(ctl), rather than have bas=
h silently exit with exit code 139, for future reference.
>>
>
> You should just have to run `ulimit -c unlimited'.
>
Thank you for your reply. It was already 'unlimited'. But when firefox segf=
aults it works (that is, `coredumpctl -r`=C2=A0 does list it), yet it doesn=
't happen for bash and I thought it's because bash is somehow catching it a=
nd handling it internally, just like this sample program does it (for which=
 only gdb can catch it, just like for bash): http://wulf.eu.org/code/fix-se=
gfault.c
But given your reply, I'm starting to wonder if it's something else going w=
rong on my OS, though a dummy test seems to imply not:
$ ./a.out=20
Segmentation fault (core dumped)$ coredumpctl -r|head -2
TIME=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 PID=C2=A0=C2=A0 UID=C2=A0=C2=A0 GID SIG COREFILE=C2=A0 E=
XE
Sat 2020-04-11 17:54:45 CEST 138406=C2=A0 1000=C2=A0 1000=C2=A0 11 present=
=C2=A0=C2=A0 /tmp/a.out
$ cat a.c
int main() {
=C2=A0 int *a=3D0;
=C2=A0 *a=3D1;
}

So I'm a little lost.

>
> --=20
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>  ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/
>