Work w/ backported closure change from OCaml 5.2.0

In DkML, OCaml 4.14.2 has backported the closure change from OCaml 5.2.0.

See https://github.com/diskuv/dkml-compiler/blob/321d4ac16c74507e1cc34aa14677e7434fe976e2/src/p/ocaml-common-4_14-a06-linearclosures.md.

dune-project

@@ -14,7 +14,8 @@
  (name earlybird)
  (synopsis "OCaml debug adapter")
  (depends
-  (ocaml (and (>= 4.12.0)))
+  (ocaml (and (>= 4.14.2)))
+  (dkml-base-compiler (and (>= 4.14.2~) (< 5.0.0~)))
   (ppx_deriving (>= 5.1))
   (ppx_deriving_yojson (>= 3.6.1))
   (menhir (and (>= 20201216) :build))

earlybird.opam

@@ -8,7 +8,8 @@ homepage: "https://github.com/hackwaly/ocamlearlybird"
 bug-reports: "https://github.com/hackwaly/ocamlearlybird/issues"
 depends: [
   "dune" {>= "2.8"}
-  "ocaml" {>= "4.12.0"}
+  "ocaml" {>= "4.14.2"}
+  "dkml-base-compiler" {>= "4.14.2~" & < "5.0.0~"}
   "ppx_deriving" {>= "5.1"}
   "ppx_deriving_yojson" {>= "3.6.1"}
   "menhir" {>= "20201216" & build}

src/debugger/inspect/eval.ml

@@ -1,6 +1,9 @@
 open Ground
 
-[%%if ocaml_version >= (5, 2, 0)]
+(* [A]
+   In DkML, OCaml 4.14.2 has backported the closure change from OCaml 5.2.0.
+   See https://github.com/diskuv/dkml-compiler/blob/321d4ac16c74507e1cc34aa14677e7434fe976e2/src/p/ocaml-common-4_14-a06-linearclosures.md. *)
+[%%if ocaml_version >= (4, 14, 2)]
 let ident_find_same_heap id (compenv: Instruct.compilation_env) =
   match compenv.ce_closure with
   | Not_in_closure -> raise Not_found

src/debugger/inspect/value_scope.ml

@@ -11,7 +11,10 @@ class virtual scope_value =
     method! num_named = -1
   end
 
-[%%if ocaml_version >= (5, 2, 0)]
+(* [A]
+   In DkML, OCaml 4.14.2 has backported the closure change from OCaml 5.2.0.
+   See https://github.com/diskuv/dkml-compiler/blob/321d4ac16c74507e1cc34aa14677e7434fe976e2/src/p/ocaml-common-4_14-a06-linearclosures.md. *)
+[%%if ocaml_version >= (4, 14, 2)]
 let iter_compenv_heap f (compenv: Instruct.compilation_env) =
   match compenv.ce_closure with
   | Not_in_closure -> ()