Tests failure with OCaml 5.2

[kit-ty-kate]

This failure looks weird to me and similar weird failures also happen with packages that depend on this one like mrmime.
If you manage to track down where it comes from be aware that 5.2 is currently in alpha1 and bugs in the compiler is not unexpected so make sure the compiler isn't doing anything funky and if it does please contact me and/or Florian.

Log:

#=== ERROR while compiling unstrctrd.0.2 ======================================#
# context              2.2.0~beta2~dev | linux/x86_64 | ocaml-variants.5.2.0+trunk | file:///home/opam/opam-repository
# path                 ~/.opam/5.2/.opam-switch/build/unstrctrd.0.2
# command              ~/.opam/5.2/bin/dune runtest -p unstrctrd -j 1
# exit-code            1
# env-file             ~/.opam/log/unstrctrd-1192-228c5b.env
# output-file          ~/.opam/log/unstrctrd-1192-228c5b.out
### output ###
# File "test/dune", line 11, characters 0-87:
# 11 | (alias
# 12 |  (name runtest)
# 13 |  (deps (:test test.exe))
# 14 |  (action (run %{test} --color=always)))
# (cd _build/default/test && ./test.exe --color=always)
# Testing `unstrctrd'.
# This run has ID `TJ3QZPTD'.
# 
#   [OK]          valid             0   "Hello".
#   [OK]          valid             1   "Hello\r\n World".
#   [OK]          valid             2   "Hello\r\n \r\n \r\n World".
#   [OK]          valid             3   " \r\n ".
#   [OK]          valid             4   "".
#   [OK]          valid             5   " ".
#   [OK]          valid             6   " \r\n ".
#   [OK]          valid             7   "Hello".
#   [OK]          valid             8   "".
#   [OK]          valid             9   "\r".
#   [OK]          valid            10   "\r\r".
#   [OK]          valid            11   "\r\n \r".
#   [OK]          valid            12   "\n".
#   [OK]          valid            13   "\n\n".
#   [OK]          valid            14   "\n\n\r\n ".
#   [OK]          valid            15   "\n\r\n Hello\r\n World\r\n !".
#   [OK]          comments          0   "Hello".
#   [OK]          comments          1   "Hello World!".
#   [OK]          comments          2   "".
#   [OK]          comments          3   "Hello".
#   [OK]          comments          4   "(Hello)".
#   [OK]          comments          5   "Hello".
# > [FAIL]        complex           0   "To:A Group :Chris Jones <[email protected]...
#   [FAIL]        complex           1   "To    : Mary Smith  <[email protected]>".
#   [FAIL]        complex           2   "Date: Thu, 13 Feb 1969 23:32 -0330 ".
#   [OK]          split_at          0   ("", "").
#   [OK]          split_at          1   ("", "Hello").
#   [OK]          split_at          2   ("Hello", "\r\n World!").
#   [OK]          split_on          0   "\r\n".
#   [OK]          split_on          1   "Hello\r\n".
#   [OK]          split_on          2   "Hello\r\n World!\r\n".
#   [OK]          split_on          3   "Hello World!\r\n".
#   [OK]          invalid           0   "Hello".
#   [OK]          invalid           1   "Hello\r".
#   [OK]          invalid           2   "Hello\n".
#   [OK]          invalid           3   "Hello\r\n ".
# 
# ┌──────────────────────────────────────────────────────────────────────────────┐
# │ [FAIL]        complex           0   "To:A Group :Chris Jones <[email protected]...  │
# └──────────────────────────────────────────────────────────────────────────────┘
# ASSERT expect
# FAIL expect
# 
#    Expected: `Error Non-terminating unstructured form'
#    Received: `Ok
#                 "To:A Group :Chris Jones <[email protected]>, [email protected], John <[email protected]> ; "'
# 
# Raised at Alcotest_engine__Test.check in file "src/alcotest-engine/test.ml", lines 196-206, characters 4-19
# Called from Alcotest_engine__Core.Make.protect_test.(fun) in file "src/alcotest-engine/core.ml", line 180, characters 17-23
# Called from Alcotest_engine__Monad.Identity.catch in file "src/alcotest-engine/monad.ml", line 24, characters 31-35
# 
# Logs saved to `~/.opam/5.2/.opam-switch/build/unstrctrd.0.2/_build/default/test/_build/_tests/unstrctrd/complex.000.output'.
#  ──────────────────────────────────────────────────────────────────────────────
# 
# Full test results in `~/.opam/5.2/.opam-switch/build/unstrctrd.0.2/_build/default/test/_build/_tests/unstrctrd'.
# 3 failures! in 0.007s. 36 tests run.
# File "test/dune", line 16, characters 0-96:
# 16 | (alias
# 17 |  (name runtest)
# 18 |  (deps (:test test_angstrom.exe))
# 19 |  (action (run %{test} --color=always)))
# (cd _build/default/test && ./test_angstrom.exe --color=always)
# Testing `unstrctrd + angstrom'.
# This run has ID `4SN0DRL3'.
# 
#   [OK]          valid            0   ["Hello World!\r\n"].
#   [OK]          valid            1   ["\r\r\n"].
#   [OK]          valid            2   ["\r\r\r\n"].
#   [OK]          valid            3   ["\r\n \r\r\n"].
#   [OK]          valid            4   ["\n\r\n"].
#   [OK]          valid            5   ["\n\n\r\n \r\n"].
#   [OK]          valid            6   ["Hello World!\r\nSubject"].
#   [OK]          valid            7   ["Hello"; " "; "World!\r\n"].
#   [OK]          valid            8   ["Hello"; ""; ""; ""; ""; ""; "\r\n"; "S...
#   [OK]          valid            9   ["Hello"; "\r\n "; ""; "World!"; "\r\n"].
#   [OK]          valid           10   ["Hello"; "\r\n"; " "; "\r\n"; ""; " "; ...
#   [OK]          valid           11   ["Hello"; "\r"; "\n"; "Subject"].
#   [OK]          valid           12   ["Hello"; "\r"; "\n"; "\r"; "\n"].
# > [FAIL]        valid           13   "From: John Doe <[email protected]>\n...
#   [FAIL]        valid           14   "From: John Doe <[email protected]>\n...
#   [OK]          valid           15   header.
#   [OK]          invalid          0   ["Hello"].
#   [OK]          invalid          1   ["Hello\r"].
#   [OK]          invalid          2   ["Hello\r\n "].
# 
# ┌──────────────────────────────────────────────────────────────────────────────┐
# │ [FAIL]        valid           13   "From: John Doe <[email protected]...  │
# └──────────────────────────────────────────────────────────────────────────────┘
# >>> Start to recognize value of "From"
# ASSERT : Non-terminating unstructured form
# FAIL : Non-terminating unstructured form
# Raised at Alcotest_engine__Test.check_err in file "src/alcotest-engine/test.ml", line 157, characters 20-48
# Called from Alcotest_engine__Core.Make.protect_test.(fun) in file "src/alcotest-engine/core.ml", line 180, characters 17-23
# Called from Alcotest_engine__Monad.Identity.catch in file "src/alcotest-engine/monad.ml", line 24, characters 31-35
# 
# Logs saved to `~/.opam/5.2/.opam-switch/build/unstrctrd.0.2/_build/default/test/_build/_tests/unstrctrd U+002B angstrom/valid.013.output'.
#  ──────────────────────────────────────────────────────────────────────────────
# 
# Full test results in `~/.opam/5.2/.opam-switch/build/unstrctrd.0.2/_build/default/test/_build/_tests/unstrctrd U+002B angstrom'.
# 2 failures! in 0.005s. 19 tests run.

[kit-ty-kate]

I found the issue. This comes from ocaml/ocaml#12514 and it means that the tests need to be changed to account for this. I'll open a PR in a minute.