unikernel/duniverse/dune_/test/blackbox-tests/test-cases/default-ocaml-flags-3-13.t

@@ -0,0 +1,25 @@
+  $ cat >dune <<EOF
+  > (library
+  >  (modes byte)
+  >  (name foo))
+  > EOF
+
+  $ cat >foo.ml <<EOF
+  > type a = { a : int }
+  > and b = { a : int ; b : bool }
+  > EOF
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.12)
+  > EOF
+  $ dune build foo.cma
+  File "foo.ml", line 2, characters 10-19:
+  2 | and b = { a : int ; b : bool }
+                ^^^^^^^^^
+  Error (warning 30 [duplicate-definitions]): the label a is defined in both types a and b.
+  [1]
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.13)
+  > EOF
+  $ dune build foo.cma