Segmentation Fault

[Honeypot95]

My emacs segfaults when trying to run vterm, after compilation of the library.

Shortest way to get the segfault:

emacs -Q -l test.el
Fatal error 11: Segmentation fault
Backtrace:
emacs(+0x14efce)[0x563887fdbfce]
emacs(+0x55960)[0x563887ee2960]
emacs(+0x55d6a)[0x563887ee2d6a]
emacs(+0x14d658)[0x563887fda658]
emacs(+0x14d6d9)[0x563887fda6d9]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x13f40)[0x7fd857f8ff40]
/home/iulian/.emacs.d/elpa/vterm-20191025.1349/vterm-module.so(emacs_module_init+0x3a)[0x7fd84b35c6ea]
emacs(+0x1d65fb)[0x5638880635fb]
emacs(+0x1d22bd)[0x56388805f2bd]
emacs(+0x1d294a)[0x56388805f94a]
emacs(+0x1b9f17)[0x563888046f17]
emacs(+0x1abd03)[0x563888038d03]
emacs(+0x1e0d39)[0x56388806dd39]
emacs(+0x1adf82)[0x56388803af82]
emacs(+0x1d1d18)[0x56388805ed18]
emacs(+0x1d2661)[0x56388805f661]
emacs(+0x1d294a)[0x56388805f94a]
emacs(+0x1b9f17)[0x563888046f17]
emacs(+0x1adf82)[0x56388803af82]
emacs(+0x1add5e)[0x56388803ad5e]
emacs(+0x1ae5b2)[0x56388803b5b2]
emacs(+0x1addb9)[0x56388803adb9]
emacs(+0x1af7fc)[0x56388803c7fc]
emacs(+0x1addb9)[0x56388803adb9]
emacs(+0x1cbeeb)[0x563888058eeb]
emacs(+0x1d1b10)[0x56388805eb10]
emacs(+0x1d2a73)[0x56388805fa73]
emacs(+0x1abd03)[0x563888038d03]
emacs(+0x1e0d39)[0x56388806dd39]
emacs(+0x1ae4ca)[0x56388803b4ca]
emacs(+0x1abc5f)[0x563888038c5f]
emacs(+0x1aeb29)[0x56388803bb29]
emacs(+0x1d2569)[0x56388805f569]
emacs(+0x1abd03)[0x563888038d03]
emacs(+0x1e0d39)[0x56388806dd39]
emacs(+0x1abc5f)[0x563888038c5f]
emacs(+0x1e0d39)[0x56388806dd39]
emacs(+0x1abc5f)[0x563888038c5f]
emacs(+0x1e0d39)[0x56388806dd39]
emacs(+0x1ad980)[0x56388803a980]
emacs(+0x1adc86)[0x56388803ac86]
...
Segmentation fault (core dumped)


cat test.el
require 'package)
(setq package-enable-at-startup nil)
(add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/"))
(package-initialize)

(unless (package-installed-p 'use-package)
  (package-refresh-contents)
  (package-install 'use-package))

(eval-when-compile
  (require 'use-package))
(require 'bind-key)

(use-package vterm
  :load-path  "."
)

emacs --version
GNU Emacs 27.0.50

cmake --version
cmake version 3.13.4

libtool --version
libtool (GNU libtool) 2.4.6

git log | head -1
commit 21b54c750b65eed9f195a2544f3a1782626fc5fe

I am not sure what else to add, so please guide me if there are more things to be added.

[jixiuf]

#147

[Honeypot95]

My system-configuration-options says:

Its value is
"--build=x86_64-linux-gnu --prefix=/usr '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' --sysconfdir=/etc --localstatedir=/var --disable-silent-rules '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' --disable-maintainer-mode --disable-dependency-tracking --prefix=/usr --sharedstatedir=/var/lib --program-suffix=-snapshot --with-modules=yes --with-x=yes --with-x-toolkit=gtk3 --with-xwidgets=yes 'CFLAGS=-g -O2 -fdebug-prefix-map=<...>/emacs-snapshot-99415=. -fstack-protector-strong -Wformat -Werror=format-security' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro'"

, which includes --with-modules. But it is still installed from the Ubuntu PPA.

[jixiuf]

(message module-file-suffix)

[Honeypot95]

(message module-file-suffix)
returns
.so

[jixiuf]

#66 (comment)
can you build a docker image for me like this to reproduce this

[Honeypot95]

Yes. I actually got some free time and I wanted to try to find the problem, compiling the actual sources that are in the ubuntu repositories, because the rules there seem to be the problem.
I will also make the docker image that reproduces the problem then.

[Honeypot95]

The dockerfile didn't work, because cmake version is not >11 in ubuntu18.04, which is the latest from docker.io apparently.
So I made this Dockerfile:

# Build and run
# docker build -t vterm .
# docker run -t -i vterm


FROM docker.io/ubuntu:latest
RUN apt-get update
RUN apt-get -y install software-properties-common # install add-apt-repository command
RUN apt-get -y install apt-transport-https ca-certificates gnupg wget

RUN wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | apt-key add -

# http://ubuntuhandbook.org/index.php/2019/02/install-gnu-emacs-26-1-ubuntu-18-04-16-04-18-10/
RUN add-apt-repository ppa:kelleyk/emacs # for emacs26  (default emacs is not compile with module support)
RUN apt-get update

RUN apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main' # this is to install cmake > 11 on ubuntu 18.04, the latest at this time
RUN apt-get update

RUN apt-get -y install cmake make git libtool-bin

RUN apt-get -y install emacs26-nox #run emacs26
RUN mkdir -p ~/.emacs.d/

RUN echo "(require 'package)" > ~/.emacs.d/init.el
RUN echo "(add-to-list 'package-archives '(\"melpa\" . \"http://melpa.org/packages/\"))" >> ~/.emacs.d/init.el
RUN echo "(or (file-exists-p package-user-dir) (package-refresh-contents))" >> ~/.emacs.d/init.el
RUN echo "(package-initialize)" >> ~/.emacs.d/init.el
RUN echo "(package-install 'vterm)" >> ~/.emacs.d/init.el
RUN echo "(let (vterm-install) (require 'vterm))" >> ~/.emacs.d/init.el

which succesfully compiles vterm, but the problem does not reproduce.

I will try to play around with the Dockerfile some more.

[Honeypot95]

Yes, so apparently the problem does not lie in the official ppa for ubuntu, but in the ubuntu emacs lisp ppa (https://launchpad.net/~ubuntu-elisp/+archive/ubuntu/ppa). I used this to install the latest emacs (emacs-snapshot) built daily, and when I tried this on the docker image, it crashed.

The final Dockerfiles is this:

# Build and run
# docker build -t vterm .
# docker run -t -i vterm


FROM docker.io/ubuntu:latest
RUN apt-get update
RUN apt-get -y install software-properties-common # install add-apt-repository command
RUN apt-get -y install apt-transport-https ca-certificates gnupg wget

RUN wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | apt-key add -

# http://ubuntuhandbook.org/index.php/2019/02/install-gnu-emacs-26-1-ubuntu-18-04-16-04-18-10/
RUN add-apt-repository ppa:kelleyk/emacs # for emacs26  (default emacs is not compile with module support)
RUN apt-get update

RUN apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main' # this is to install cmake > 11 on ubuntu 18.04, the latest at this time
RUN apt-get update

RUN apt-get -y install cmake make git libtool-bin

# add the emacs-snapshot for ubuntu ppa
RUN add-apt-repository ppa:ubuntu-elisp/ppa
RUN apt-get update

RUN apt-get -y install emacs-snapshot #run emacs-snapshot

# RUN apt-get -y install emacs26 #run emacs26
RUN mkdir -p ~/.emacs.d/

RUN echo "(require 'package)" > ~/.emacs.d/init.el
RUN echo "(add-to-list 'package-archives '(\"melpa\" . \"http://melpa.org/packages/\"))" >> ~/.emacs.d/init.el
RUN echo "(or (file-exists-p package-user-dir) (package-refresh-contents))" >> ~/.emacs.d/init.el
RUN echo "(package-initialize)" >> ~/.emacs.d/init.el
RUN echo "(package-install 'vterm)" >> ~/.emacs.d/init.el
RUN echo "(let (vterm-install) (require 'vterm))" >> ~/.emacs.d/init.el

I assume this is not a vterm problem, as it does not reproduce on the standard ppa and neither when compiling emacs from source, so I should open an issue on the ppa itself.

i can now close this if you want.

[jixiuf]

feel free to close