Internal error

[Swrup]

Expected Behavior

show me an error, do not crash

Actual Behavior

dune build @all crash

Reproduction

here is the repository that make it crash:
https://git.zapashcanon.fr/swrup/leaflet-dune-bug

Specifications

• Version of dune 3.0.3
• Version of ocaml 4.13.1

[zapashcanon]

It's the same for me (I asked @Swrup to open the issue). Here's the full error message :

$ dune build @all
Internal error, please report upstream including the contents of _build/log.
Description:
  ("[gen_rules] did not specify rules for the context",
  { context_or_install = "vendor" })
Raised at Stdune__code_error.raise in file "otherlibs/stdune/code_error.ml",
  line 11, characters 30-62
Called from Fiber.Scheduler.exec in file "src/fiber/fiber.ml", line 854,
  characters 10-13
-> required by ("gen-rules", "vendor/Leaflet.contextmenu")
-> required by ("load-dir", In_build_dir "vendor/Leaflet.contextmenu")
-> required by
   ("build-file",
   In_build_dir "vendor/Leaflet.contextmenu/leaflet.contextmenu.js")
-> required by ("Rule.make", ())
-> required by
   ("execute-rule",
   { id = 22
   ; info =
       From_dune_file
         { pos_fname = "src/contextmenu/dune"
         ; start = { pos_lnum = 1; pos_bol = 0; pos_cnum = 0 }
         ; stop = { pos_lnum = 7; pos_bol = 143; pos_cnum = 208 }
         }
   })
-> required by ("<unnamed>", ())
-> required by
   ("build-file",
   In_build_dir
     "install/default/lib/leaflet/contextmenu/leaflet.contextmenu.js")
-> required by ("Rule.make", ())
-> required by ("execute-rule", { id = 48; info = Internal })
-> required by ("<unnamed>", ())
-> required by ("build-file", In_build_dir "default/leaflet.install")
-> required by
   ("build-pred",
   { dir = In_build_dir "default"
   ; predicate = { id = exclude }
   ; only_generated_files = true
   })
-> required by ("<unnamed>", ())
-> required by ("build-alias", { dir = "default"; name = "all" })
-> required by ("toplevel", ())

I must not crash.  Uncertainty is the mind-killer. Exceptions are the
little-death that brings total obliteration.  I will fully express my cases. 
Execution will pass over me and through me.  And when it has gone past, I
will unwind the stack along its path.  Where the cases are handled there will
be nothing.  Only I will remain.

It seems related to #5212 (same error) and thus #4034 but IIUC it's not exactly the same as here, the dependency is not outside of the workspace but inside it.

[zapashcanon]

OK actually I got confused, I looked at src/dune instead of src/contextmenu/dune which clearly points out of the workspace. This is thus a duplicate and can be closed @Swrup. Sorry for the noise...