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

[Dave Jones]

Reproduced on a Pi4 running the current focal daily:

ubuntu at ubuntu:~$ python3 -c "import goocalendar; print(goocalendar.__version__)"                                                                                                                           
Unable to init server: Could not connect: Connection refused
Unable to init server: Could not connect: Connection refused
0.5
ubuntu at ubuntu:~$ sudo apt install -t focal-proposed python3-gi
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libffi7 python3-gi-cairo
The following NEW packages will be installed:
  libffi7
The following packages will be upgraded:
  python3-gi python3-gi-cairo
2 upgraded, 1 newly installed, 0 to remove and 85 not upgraded.
Need to get 220 kB of archives.
After this operation, 60.4 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-gi-cairo arm64 3.34.0-3build2 [8336 B]
Get:2 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 libffi7 arm64 3.3-2.3build1 [17.1 kB]
Get:3 http://ports.ubuntu.com/ubuntu-ports focal-proposed/main arm64 python3-gi arm64 3.34.0-3build2 [195 kB]
Fetched 220 kB in 2s (114 kB/s)      
(Reading database ... 79794 files and directories currently installed.)
Preparing to unpack .../python3-gi-cairo_3.34.0-3build2_arm64.deb ...
Unpacking python3-gi-cairo (3.34.0-3build2) over (3.34.0-3) ...
Selecting previously unselected package libffi7:arm64.
Preparing to unpack .../libffi7_3.3-2.3build1_arm64.deb ...
Unpacking libffi7:arm64 (3.3-2.3build1) ...
Preparing to unpack .../python3-gi_3.34.0-3build2_arm64.deb ...
Unpacking python3-gi (3.34.0-3build2) over (3.34.0-3) ...
Setting up libffi7:arm64 (3.3-2.3build1) ...
Setting up python3-gi (3.34.0-3build2) ...
Setting up python3-gi-cairo (3.34.0-3build2) ...
Processing triggers for libc-bin (2.30-0ubuntu3) ...
ubuntu at ubuntu:~$ python3 -c "import goocalendar; print(goocalendar.__version__)"
Segmentation fault (core dumped)

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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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