[Bug 1859610] Re: python-gi/arm64 segfaults with the focal-proposed libffi version

[Dave Jones]

> Do you have the new python3.7 installed from focal-proposed?

> note, i was running everything from proposed. Since libffi6 & 7 might
> be used by python3.7.

Ah, no I didn't. However, doesn't seem like it makes much difference:

ubuntu at ubuntu:~$ sudo apt install -t focal-proposed python3.7
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libpython3.7 libpython3.7-dbg libpython3.7-minimal libpython3.7-stdlib python3.7-dbg python3.7-minimal
Suggested packages:
  python3.7-venv python3.7-doc python3-gdbm-dbg python3-tk-dbg binfmt-support
The following packages will be upgraded:
  libpython3.7 libpython3.7-dbg libpython3.7-minimal libpython3.7-stdlib python3.7 python3.7-dbg
  python3.7-minimal
7 upgraded, 0 newly installed, 0 to remove and 72 not upgraded.
Need to get 32.9 MB of archives.
After this operation, 26.6 kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3.7-dbg arm64 3.7.6-1ubuntu2 [15.9 MB]
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3.7 arm64 3.7.6-1ubuntu2 [304 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7 arm64 3.7.6-1ubuntu2 [1373 kB]
Get:4 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7-dbg arm64 3.7.6-1ubuntu2 [11.4 MB]
Get:5 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7-stdlib arm64 3.7.6-1ubuntu2 [1717 kB]
Get:6 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3.7-minimal arm64 3.7.6-1ubuntu2 [1723 kB]
Get:7 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libpython3.7-minimal arm64 3.7.6-1ubuntu2 [547 kB]
Fetched 32.9 MB in 25s (1316 kB/s)
(Reading database ... 80531 files and directories currently installed.)
Preparing to unpack .../0-python3.7-dbg_3.7.6-1ubuntu2_arm64.deb ...
Unpacking python3.7-dbg (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../1-python3.7_3.7.6-1ubuntu2_arm64.deb ...
Unpacking python3.7 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../2-libpython3.7_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../3-libpython3.7-dbg_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7-dbg:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../4-libpython3.7-stdlib_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7-stdlib:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../5-python3.7-minimal_3.7.6-1ubuntu2_arm64.deb ...
Unpacking python3.7-minimal (3.7.6-1ubuntu2) over (3.7.6-1) ...
Preparing to unpack .../6-libpython3.7-minimal_3.7.6-1ubuntu2_arm64.deb ...
Unpacking libpython3.7-minimal:arm64 (3.7.6-1ubuntu2) over (3.7.6-1) ...
Setting up libpython3.7-minimal:arm64 (3.7.6-1ubuntu2) ...
Setting up python3.7-minimal (3.7.6-1ubuntu2) ...
Setting up libpython3.7-stdlib:arm64 (3.7.6-1ubuntu2) ...
Setting up libpython3.7:arm64 (3.7.6-1ubuntu2) ...
Setting up libpython3.7-dbg:arm64 (3.7.6-1ubuntu2) ...
Setting up python3.7 (3.7.6-1ubuntu2) ...
Setting up python3.7-dbg (3.7.6-1ubuntu2) ...
Processing triggers for libc-bin (2.30-0ubuntu3) ...
Processing triggers for man-db (2.9.0-2) ...
Processing triggers for mime-support (3.64ubuntu1) ...
ubuntu at ubuntu:~$ python3 -c "import goocalendar; print(goocalendar.__version__)"
Segmentation fault (core dumped)

I'll keep the SD card around for a few days if you want me to dig into
this any further.

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https://bugs.launchpad.net/bugs/1859610

Title:
  python-gi/arm64 segfaults with the focal-proposed libffi version

Status in libffi package in Ubuntu:
  Incomplete
Status in libffi source package in Focal:
  Incomplete

Bug description:
  Testcase, on focal/arm64

  $ sudo apt install python3-goocalendar
  $ python3 -c "import goocalendar ; print(goocalendar.__version__)"

  -> works fine

  install the python3-gi package from focal-proposed it segfaults in
  libffi

  Program received signal SIGSEGV, Segmentation fault.
  0x0000000000000000 in ?? ()
  (gdb) bt
  #0  0x0000000000000000 in ?? ()
  #1  0x0000fffff7390ff8 in ffi_call_SYSV () at ../src/aarch64/sysv.S:114
  #2  0x0000fffff7390634 in ffi_call_int (cif=0xa12d78, fn=<optimized out>, 
      orig_rvalue=<optimized out>, avalue=0x0, closure=<optimized out>)

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