Ocaml_typing.PredefSourceval build_initial_env :
(Ident.t -> Types.type_declaration -> 'a -> 'a) ->
(Ident.t -> Types.extension_constructor -> 'a -> 'a) ->
'a ->
'aAll predefined exceptions, exposed as Ident.t for flambda (for building value approximations). The Ident.t for division by zero is also exported explicitly so flambda can generate code to raise it.