It seems that there is still (or again) something broken. For the images of 
the beta releases since the 8th of December Sage crashes if I try to start 
it:

Sage build/upgrade complete!
make[1]: Leaving directory '/home/sage/sage'
sage@8711c66abafe:~/sage$ ./sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.3.beta5, Release Date: 2020-12-27               │
│ Using Python 3.8.5. Type "help()" for help.                        │
└────────────────────────────────────────────────────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Warning: this is a prerelease version, and it may be unstable.     ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
------------------------------------------------------------------------
/home/sage/sage/local/lib/python3.8/site-packages/cysignals/signals.cpython-38-x86_64-linux-gnu.so(+0x6b28)[0x7ff042b33b28]
/home/sage/sage/local/lib/python3.8/site-packages/cysignals/signals.cpython-38-x86_64-linux-gnu.so(+0x6d08)[0x7ff042b33d08]
/home/sage/sage/local/lib/python3.8/site-packages/cysignals/signals.cpython-38-x86_64-linux-gnu.so(+0x93a0)[0x7ff042b363a0]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7ff0523f9390]
/home/sage/sage/local/lib/libgmp.so.10(__gmpz_sizeinbase+0x47)[0x7ff049df0597]
/home/sage/sage/local/lib/python3.8/site-packages/sage/rings/rational.cpython-38-x86_64-linux-gnu.so(+0x1f78c)[0x7ff036e2978c]
/home/sage/sage/local/lib/python3.8/site-packages/sage/rings/rational.cpython-38-x86_64-linux-gnu.so(+0x370d5)[0x7ff036e410d5]
............
/home/sage/sage/local/lib/libpython3.8.so.1.0(+0x185260)[0x7ff05278a260]
/home/sage/sage/local/lib/libpython3.8.so.1.0(PyRun_FileExFlags+0x95)[0x7ff05278cb45]
/home/sage/sage/local/lib/libpython3.8.so.1.0(PyRun_SimpleFileExFlags+0xf6)[0x7ff05278ccb6]
/home/sage/sage/local/lib/libpython3.8.so.1.0(Py_RunMain+0x748)[0x7ff0527a7398]
/home/sage/sage/local/lib/libpython3.8.so.1.0(Py_BytesMain+0x39)[0x7ff0527a77c9]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7ff05203e840]
python3(_start+0x29)[0x400709]
------------------------------------------------------------------------
Attaching gdb to process id 9075.
Cannot find gdb installed
GDB is not installed.
Install gdb for enhanced tracebacks.
------------------------------------------------------------------------
Unhandled SIGILL: An illegal instruction occurred.
This probably occurred because a *compiled* module has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Python will now terminate.
------------------------------------------------------------------------
Illegal instruction (core dumped)

Furthermore, all pipelines on individual branches since that date failed.
Frédéric Chapoton schrieb am Dienstag, 8. Dezember 2020 um 09:33:03 UTC+1:

> the build for 9.3.beta3 has passed successfully, so there should be a 
> docker for that, and a docker for develop that should point to the same.
>
> https://gitlab.com/sagemath/sage/-/pipelines
>
> Frédéric
>
> Le jeudi 15 octobre 2020 à 12:09:15 UTC+2, Sébastien Labbé a écrit :
>
>> Bonjour,
>>
>> Thanks to Vincent, I learned recently how to use continuous integration 
>> in gitlab and the docker images of previous versions of sage posted 
>> https://hub.docker.com/r/sagemath/sagemath-dev/ in order to test that my 
>> optional package works with all those versions. It basically made me 
>> realize that my package was broken on most versions of sage except the most 
>> recent. And hopefully soon, I will be able to fix those issues. So thanks 
>> to those involved in having these various docker images available.
>>
>> For the curious, the most recent run is available here:
>> https://gitlab.com/seblabbe/slabbe/-/pipelines/202932270
>> it shows that my package works for 9.1.rc5 but not 9.0 or earlier 
>> versions (I need to work on it).
>>
>> Unfortunately, it seems the docker images of various versions of sage are 
>> not uploaded since 4 months. Maybe it was too much energy to upload all 
>> beta versions there. In fact, I don't really need all beta in there. What I 
>> think is important to have are the final releases. With that respect, the 
>> following are missing:
>>
>> 8.6: ok
>> 8.7: ok
>> 8.8: ok
>> 8.9 is missing or is broken
>> 9.0 : ok
>> 9.1 is missing (so I am using 9.1.rc5 and 9.1.rc5-py3)
>>
>> No 9.2.betaX are there, but I would be happy that 9.2 be there when 
>> released.
>>
>> Thanks to the people involved.
>>
>> Sincerely,
>>
>> Sébastien
>>
>

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