Dune 3.21.0 crashes and hangs with "Dependency cycle between ..."

[nojb]

Error message (repro below):

Error: Dependency cycle between:
   _build/default/js_of_ocaml/compiler/bin-js_of_ocaml/install-in-share.sexp
-> Computing installable artifacts for package yojson-five
-> %{lib:ppxlib.ast:ast.ml} at ppxlib/src/dune:32
-> _build/default/ppxlib/src/ast_pattern_generated.ml
-> _build/default/ppxlib/src/.ppxlib.objs/ppxlib__Ast_pattern_generated.impl.d
-> _build/default/ppxlib/src/.ppxlib.objs/ppxlib__Ast_pattern_generated.impl.all-deps
-> _build/default/ppxlib/src/.ppxlib.objs/ppxlib__Ast_pattern.intf.all-deps
-> _build/default/ppxlib/src/.ppxlib.objs/ppxlib.impl.all-deps
-> _build/default/ppxlib/src/.ppxlib.objs/byte/ppxlib.cmi
-> _build/default/ppxlib/src/.ppxlib.objs/native/ppxlib.cmx
-> _build/default/.ppx/64cf5d61f2a2476b17e06d5599aa127f/dune__exe___ppx.cmx
-> _build/default/.ppx/64cf5d61f2a2476b17e06d5599aa127f/ppx.exe
-> _build/default/js_of_ocaml/compiler/lib/annot_lexer.pp.mli
-> _build/default/js_of_ocaml/compiler/lib/.js_of_ocaml_compiler.objs/byte/js_of_ocaml_compiler__Annot_lexer.cmi
-> _build/default/js_of_ocaml/compiler/lib/.js_of_ocaml_compiler.objs/native/js_of_ocaml_compiler__Annot_lexer.cmx
-> _build/default/js_of_ocaml/compiler/lib/js_of_ocaml_compiler.a
-> _build/default/js_of_ocaml/compiler/bin-js_of_ocaml/js_of_ocaml.exe
-> _build/default/js_of_ocaml/compiler/bin-js_of_ocaml/cmdliner-support/share
-> %{deps} at js_of_ocaml/compiler/bin-js_of_ocaml/dune:56
-> _build/default/js_of_ocaml/compiler/bin-js_of_ocaml/install-in-share.sexp
-> required by Computing installable artifacts for package gen
-> required by _build/default/gen/gen.install
-> required by alias gen/install

Repro: execute the following shell script in an empty directory

#!/bin/sh

git clone --depth 1 https://github.com/c-cube/gen
git clone --depth 1 https://github.com/ocsigen/js_of_ocaml
git clone --depth 1 https://gitlab.inria.fr/fpottier/menhir
git clone --depth 1 https://github.com/janestreet/ocaml-compiler-libs
git clone --depth 1 https://github.com/ocaml-ppx/ppx_derivers
git clone -b 0.37.0 https://github.com/ocaml-ppx/ppxlib
git clone --depth 1 https://github.com/ocaml-community/sedlex
git clone --depth 1 https://github.com/c-cube/seq
git clone -b v0.17.0 https://github.com/janestreet/sexplib0
git clone --depth 1 https://github.com/ocaml-community/yojson

touch dune-workspace

dune build @install

[nojb]

(Note that the js_of_ocaml version has not been released, but even if there was a bug in the js_of_ocaml build, Dune should at a minimum not hang.)

[shonfeder]

I've updated the title, assuming this is for dune 3.21. Please revert back if that was a mistake.

[nojb]

I've updated the title, assuming this is for dune 3.21. Please revert back if that was a mistake.

You are right, thanks.

[Alizter]

The hanging when detecting a cycle is likely #5771.