name: mc-installer
title: Minecraft Installer
version: '7.1'
summary: A simple installer for Minecraft - Java Edition
description: |
A simple installer for Minecraft - Java Edition.
license: MIT
base: core18
grade: stable
confinement: strict
architectures:
- build-on: amd64
apps:
mc-installer:
extensions:
- gnome-3-34
command: launch
plugs:
- network
- opengl
- audio-playback
- pulseaudio # compatibility with snapd <2.41
- browser-support
- home
environment:
PYTHONPATH: $SNAP/gnome-platform/usr/lib/python3/dist-packages
JAVA_HOME: $SNAP/usr/lib/jvm/java-8-openjdk-amd64/
parts:
launcher:
plugin: dump
source: scripts
game:
plugin: nil
build-packages:
- openjdk-8-jre-headless
# Fix for "package contains external symlinks" issue
# https://forum.snapcraft.io/t/resolve-package-contains-external-symlinks-error-when-trying-to-snap/2963
- ca-certificates
- ca-certificates-java
stage-packages:
- libglu1-mesa
- libswt-gtk-3-java
- python3-requests
- openjdk-8-jre-headless
- libxss1
- libgconf2-4
- libcurl3
# https://snapcraft-utils-library.readthedocs.io/en/latest/lib/cleanup.html
cleanup:
after: # Make this part run last; list all your other parts here
- game
- launcher
plugin: nil
build-snaps: # List all content-snaps and base snaps you're using here
- core18
- gnome-3-28-1804
override-prime: |
set -eux
for snap in "core18" "gnome-3-28-1804"; do # List all content-snaps and base snaps you're using here
cd "/snap/$snap/current" && find . -type f,l -exec rm -f "$SNAPCRAFT_PRIME/{}" \;
done
The snap was working perfectly before a new build was triggered - nothing changed to it’s baseline so I’m going to assume that something changed with the build service (maybe?). This same error is occurring on Pop! and Solus; so at least it’s consistent.
I can see in strace that there are over 13k references to No such file or directory
I could use some pointers to get moving in the right direction.
You can try to run it under gdb viasnap run --gdb (must be run as root), or snap run --experimental-gdbserver. The latter can be run as user, so will likely be more representative. Once in gdb, use bt to see the backtrace. With little luck, you may be able to figure out the root cause or at least get some hints.
Solus is too I guess? That said, version 7.0 works perfectly. It’s with 7.1 (edge) that’s causing the problem.
Still core18, just an update in the build service is rendering this issue as far as I can tell. Solus uses an older version of snapd, vs Pop!
@mborzecki I might be missing something but I’ve reviewed documentation about using gdb and it won’t work. I’ve tried on two different distros and nada.
Both gdb and gdbserver. Since it’s Python that segfaults, you need to toggle detach-on-fork to off in gdb. Then after walking though a number of inferiors you’ll get to:
Continuing.
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
process 1205693 is executing new program: /usr/bin/python3.6
Thread 4.1 "python3" hit Catchpoint 1 (exec'd /usr/bin/python3.6), 0x00007f12d7843090 in ?? () from target:/lib64/ld-linux-x86-64.so.2
(gdb) info inferiors
Num Description Executable
1 process 1205506 target:/bin/bash
3 process 1205658 target:/bin/bash
* 4 process 1205693 target:/usr/bin/python3.6
Which next segfaults like so:
Thread 4.1 "python3" received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x00007f12d5550dae in ffi_call_unix64 () from target:/usr/lib/x86_64-linux-gnu/libffi.so.6
#2 0x00007f12d555071f in ffi_call () from target:/usr/lib/x86_64-linux-gnu/libffi.so.6
#3 0x00007f12d5f98e6a in ?? () from target:/snap/mc-installer/509/gnome-platform/usr/lib/python3/dist-packages/gi/_gi.cpython-36m-x86_64-linux-gnu.so
#4 0x00007f12d5f9aa48 in ?? () from target:/snap/mc-installer/509/gnome-platform/usr/lib/python3/dist-packages/gi/_gi.cpython-36m-x86_64-linux-gnu.so
#5 0x00000000005a9eec in _PyObject_FastCallKeywords ()
#6 0x000000000050a783 in ?? ()
#7 0x000000000050c1f4 in _PyEval_EvalFrameDefault ()
#8 0x0000000000507f24 in ?? ()
#9 0x0000000000516449 in ?? ()
#10 0x00000000005671ce in PyCFunction_Call ()
#11 0x0000000000511341 in _PyEval_EvalFrameDefault ()
#12 0x0000000000507f24 in ?? ()
#13 0x0000000000509c50 in ?? ()
#14 0x000000000050a64d in ?? ()
#15 0x000000000050c1f4 in _PyEval_EvalFrameDefault ()
#16 0x0000000000509918 in ?? ()
#17 0x000000000050a64d in ?? ()
#18 0x000000000050c1f4 in _PyEval_EvalFrameDefault ()
#19 0x0000000000509918 in ?? ()
#20 0x000000000050a64d in ?? ()
#21 0x000000000050c1f4 in _PyEval_EvalFrameDefault ()
#22 0x0000000000509918 in ?? ()
#23 0x000000000050a64d in ?? ()
#24 0x000000000050c1f4 in _PyEval_EvalFrameDefault ()
#25 0x0000000000509015 in _PyFunction_FastCallDict ()
#26 0x00000000005a4d81 in _PyObject_FastCallDict ()
#27 0x00000000005a5dbe in _PyObject_CallMethodIdObjArgs ()
#28 0x00000000004f6f4d in PyImport_ImportModuleLevelObject ()
#29 0x0000000000514414 in ?? ()
#30 0x0000000000567193 in PyCFunction_Call ()
#31 0x0000000000511341 in _PyEval_EvalFrameDefault ()
#32 0x0000000000507f24 in ?? ()
#33 0x0000000000509c50 in ?? ()
#34 0x000000000050a64d in ?? ()
#35 0x000000000050c1f4 in _PyEval_EvalFrameDefault ()
#36 0x0000000000507f24 in ?? ()
#37 0x0000000000509202 in _PyFunction_FastCallDict ()
#38 0x00000000005a4d81 in _PyObject_FastCallDict ()
#39 0x00000000005a5dbe in _PyObject_CallMethodIdObjArgs ()
#40 0x00000000004f6e9c in PyImport_ImportModuleLevelObject ()
#41 0x000000000050e0ff in _PyEval_EvalFrameDefault ()
#42 0x0000000000507f24 in ?? ()
#43 0x0000000000516449 in ?? ()
#44 0x00000000005671ce in PyCFunction_Call ()
#45 0x0000000000511341 in _PyEval_EvalFrameDefault ()
#46 0x0000000000507f24 in ?? ()
I suspect it’s segfaulting while importing gi or one of the gi wrappers. It’s not entirely clear why, but if you have python debug extensions maybe you’ll be able to debug deeper.
Thanks @mborzecki, you helped out a lot. Now I know what to do going forward. Also, based on your post, I was able to determine exactly what the problem was and the fix. See: Gnome-3-34 extension and Python segfault
