Fatal failure while invoking alias

[vsiles]

Version (opam show):

<><> Version-specific details <><><><><><><><><><><><><><><><><><><><><><><><><>
version 1.9.1
repository default
url.src: "https://github.com/ocaml/dune/releases/download/1.9.1/dune-1.9.1.tbz"
url.checksum: "sha256=c9a1e258a14d96fd95fb525e7659c371e8b1d253905e3d39c5b2efa280b4927c"
"sha512=842d0aa7fbe97bc5a0fde974fa9ddd95d8e2f60a7018b60779cf782282e2bc362f4ae347cd7795b857a8e05ebb9d82f1236c0e4d1e7ec10d3b210028bc2058c1"
homepage: "https://github.com/ocaml/dune"
bug-reports: "https://github.com/ocaml/dune/issues"

Problem

I have the following alias to build multiple exe at once:

$ cat dune  
  (alias
    (name exe)
    (deps
      src/hh_server.exe
      src/hh_client.exe
      src/hh_single_type_check.exe
      src/hackfmt.exe
      src/hh_parse.exe
      src/hh_single_compile.exe
      src/hh_single_parse.exe))

Works like a charm with ocaml 4.05.0 and dune 1.4.3. I'm testing an update to ocaml 4.07.1 and dune 1.9.1 (both from a fresh opam switch).

I can still invoke dune to build each exe one by one with success, but if I invoke the alias I get the following error:

$ dune build @exe
Internal error, please report upstream including the contents of _build/log.
Description:
(Option.value_exn)
Backtrace:
Raised at file "src/stdune/exn.ml", line 40, characters 5-10
Called from file "src/stdune/option.ml" (inlined), line 40, characters 12-48
Called from file "src/lib.ml", line 1168, characters 36-57
Called from file "src/lib.ml", line 625, characters 21-30
Called from file "src/lib.ml", line 1165, characters 8-515
Called from file "src/lib.ml", line 1189, characters 12-39
Called from file "src/stdune/result.ml" (inlined), line 26, characters 12-15
Called from file "src/stdune/result.ml" (inlined), line 55, characters 20-29
Called from file "src/inline_tests.ml", line 201, characters 10-112
Called from file "list.ml", line 106, characters 12-15
Called from file "src/lib_rules.ml", line 513, characters 4-152
Called from file "src/stdune/exn.ml", line 29, characters 8-11
Re-raised at file "src/stdune/exn.ml", line 31, characters 30-37
Called from file "src/gen_rules.ml", line 82, characters 10-75
Called from file "src/gen_rules.ml", line 145, characters 51-65
Called from file "list.ml", line 117, characters 24-34
Called from file "src/gen_rules.ml", line 143, characters 12-165
Called from file "src/gen_rules.ml", line 258, characters 23-53
Called from file "src/stdune/exn.ml", line 29, characters 8-11
Re-raised at file "src/stdune/exn.ml", line 31, characters 30-37
Called from file "src/memo/implicit_output.ml", line 110, characters 4-128
Called from file "src/build_system.ml", line 890, characters 4-71
Called from file "src/build_system.ml", line 1006, characters 6-102
Called from file "src/build_system.ml", line 984, characters 6-42
Re-raised at file "src/build_system.ml", line 995, characters 6-17
Called from file "src/build_system.ml" (inlined), line 954, characters 32-63
Called from file "src/build_system.ml", line 964, characters 4-24
Called from file "src/build_interpret.ml", line 49, characters 24-40
Called from file "src/build_interpret.ml", line 33, characters 31-59
Called from file "src/build_interpret.ml", line 33, characters 31-59
Called from file "src/build_system.ml", line 935, characters 6-78
Called from file "src/fiber/fiber.ml", line 176, characters 6-11
Re-raised at file "src/stdune/exn.ml" (inlined), line 65, characters 38-65
Called from file "src/stdune/exn_with_backtrace.ml", line 17, characters 2-40
Called from file "src/fiber/fiber.ml", line 82, characters 8-15

I must not segfault.  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.

As requested, the (slightly redacted) log:

$ cat _build/log
# dune build @exe
# OCAMLPARAM: unset
$ /bin/nproc > /tmp/dune71d2b3.output 2> /dev/null
$ /HOME/opam/recent_hack/bin/ocamlc.opt -config > /tmp/dunec86967.output
$ (cd src/utils/messages && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/utils/messages/dune.ml)
$ (cd src/utils/logging && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/utils/logging/dune.ml)
$ (cd src/fsnotify && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/fsnotify/dune.ml)
$ (cd src/utils/debug && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/utils/debug/dune.ml)
$ (cd test/ffp_autocomplete && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/test/ffp_autocomplete/dune.ml)
$ (cd src/ai && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/ai/dune.ml)
$ (cd src/utils/load_script && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/utils/load_script/dune.ml)
$ (cd src/utils/linting && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/src/utils/linting/dune.ml)
$ (cd test/typecheck && /HOME/opam/recent_hack/bin/ocaml -I +compiler-libs /HOME/WORK/hphp/hack/_build/.dune/default/test/typecheck/dune.ml)