Tests fail on OCaml 5.00

[kit-ty-kate]

#=== ERROR while compiling ocamlgraph.2.0.0 ===================================#
# context              2.2.0~alpha~dev | linux/x86_64 | ocaml-variants.5.00.0+trunk | file:///home/opam/opam-repository
# path                 ~/.opam/5.00/.opam-switch/build/ocamlgraph.2.0.0
# command              ~/.opam/opam-init/hooks/sandbox.sh build dune build -p ocamlgraph -j 47 @install @runtest
# exit-code            1
# env-file             ~/.opam/log/ocamlgraph-2162-7fb849.env
# output-file          ~/.opam/log/ocamlgraph-2162-7fb849.out
### output ###
# test_wto: all tests succeeded.
# File "tests/test_components.expected", line 1, characters 0-0:
# strat: all tests succeeded.
# test_fixpoint: all tests succeeded.
# basic: all tests succeeded.
# dot: all tests succeeded.
# test_bf: all tests succeeded.
# test_johnson: all tests succeeded.
# test_chaotic: all tests succeeded.
# test_topsort alias tests/runtest
# test topsort: all tests succeeded.
#        check alias tests/runtest
# check: all tests succeeded
#          git (internal) (exit 1)
# (cd _build/default && /usr/bin/git --no-pager diff --no-index --color=always -u tests/test_components.expected tests/test_components.output)
# diff --git a/tests/test_components.expected b/tests/test_components.output
# index fe0501b..84d3bd2 100644
# --- a/tests/test_components.expected
# +++ b/tests/test_components.output
# @@ -1,11 +1,11 @@
#  7 components
#  0 -> 0
#  1 -> 1
# -2 -> 1
# -3 -> 2
# -4 -> 3
# -5 -> 3
# -6 -> 4
# -7 -> 5
# -8 -> 6
# -9 -> 0
# +2 -> 2
# +3 -> 3
# +4 -> 2
# +5 -> 0
# +6 -> 1
# +7 -> 4
# +8 -> 5
# +9 -> 6

[backtracking]

Thanks @kit-ty-kate for reporting this!
Clearly the OCaml random generator is not initialized the same way in 5.00.
But this is really weird that we are making use of random like this in a regression test 😬
I'm fixing that with a Random.init for now.

[kit-ty-kate]

cc @Octachron did something changed in trunk there? I couldn’t find anything in the changelog at a glance

[Octachron]

The PRNG itself has been changed in 5.0 (ocaml/ocaml#10742) to a splittable PRNG in order to have by-domain PRNG with good statistical properties. I fear that this means that 4.14 Random and 5.0 Random will yield different results.