Sysimage failure with Julia 1.6

[bkmi]

Running the installation seems to cause a problem now. Using
julia version 1.6.2
Python 3.8.10

when running the installation process, these lines fail:

diffeqtorch/diffeqtorch/install.py

Lines 75 to 80 in f8b9285

	output = subprocess.run(
	f"julia --project={JULIA_PROJECT} {JULIA_PROJECT}/sysimage.jl",
	shell=True,
	check=True,
	capture_output=True,
	)

...
Build Julia system image                                                                                                                                                                                           Traceback (most recent call last):                                                                                                                                                                                   File "<string>", line 1, in <module>                                                                                                                                                                               File "/home/ben/loc/lib/python3.8/site-packages/diffeqtorch/install.py", line 29, in install_and_test                                                                                               install_julia_sysimage()                                                                                                                                                                                         File "/home/ben/loc/lib/python3.8/site-packages/diffeqtorch/install.py", line 75, in install_julia_sysimage                                                                                         output = subprocess.run(                                                                                                                                                                                         File "/home/ben/loc/lib/python3.8/subprocess.py", line 516, in run                                                                                                                                  raise CalledProcessError(retcode, process.args,                                                                                                                                                                subprocess.CalledProcessError: Command 'julia --project=/home/ben/loc/lib/python3.8/site-packages/diffeqtorch/julia /home/ben/loc/lib/python3.8/site-packages/diffeqtorch/julia/sysimage.jl' returned non-zero exit status 1.

I shortened the path, but the error should still make sense. I ran the command myself:
julia --project=/home/ben/loc/lib/python3.8/site-packages/diffeqtorch/julia /home/ben/loc/lib/python3.8/site-packages/diffeqtorch/julia/sysimage.jl

I got the following output from julia:

Build system image
ERROR: LoadError: UndefVarError: create_sysimage not defined
Stacktrace:
[1] main()
@ Main ~/loc/lib/python3.8/site-packages/diffeqtorch/julia/sysimage.jl:32
[2] top-level scope
@ ~/loc/lib/python3.8/site-packages/diffeqtorch/julia/sysimage.jl:37
in expression starting at /home/ben/loc/lib/python3.8/site-packages/diffeqtorch/julia/sysimage.jl:37

[bkmi]

Hmm, it seems that installing diffeqtorch as a submodule in pip -e mode allowed for it to work... I also manually added the dependency of

import Pkg
Pkg.add("PackageCompiler")

It's odd though because if the PackageCompiler was not installed, there should have been a different error, namely an import error.

[jan-matthis]

Hi, thanks for reporting this! It is indeed a bit odd, I'd have expected that PackageCompiler gets installed since it is specified in Project.toml with the correct UUID. I have not updated Julia to version 1.6 yet, my first suspicion is that it has to do with that. I'll update my version soon and see if I can reproduce it.

[jan-matthis]

I updated Julia 1.4 to Julia 1.6. I first ran into an issue with Julia's package registry, which I fixed brute-force by removing~/.julia. Unfortunately, I then encountered a segfault which is also described in an open issue here: JuliaPy/pyjulia#437. I will wait for the upstream issue to be resolved.

My current understanding is that diffeqtorch requires Julia ≤1.5 (at least on macOS), and Python ≤3.8.

[rakhmaevao]

Same problem on Julia 1.7.0, Python 3.8, Ubuntu 20.04.