diff options
| -rw-r--r-- | testsuite/tests/typing-misc/ocamltests | 1 | ||||
| -rw-r--r-- | testsuite/tests/typing-misc/scope_escape.ml | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/testsuite/tests/typing-misc/ocamltests b/testsuite/tests/typing-misc/ocamltests index 5bad7b5f4c..f1db9c4c06 100644 --- a/testsuite/tests/typing-misc/ocamltests +++ b/testsuite/tests/typing-misc/ocamltests @@ -15,6 +15,7 @@ pr7228.ml pr7668_bad.ml printing.ml records.ml +scope_escape.ml unique_names_in_unification.ml variant.ml wellfounded.ml diff --git a/testsuite/tests/typing-misc/scope_escape.ml b/testsuite/tests/typing-misc/scope_escape.ml new file mode 100644 index 0000000000..8f57363bf8 --- /dev/null +++ b/testsuite/tests/typing-misc/scope_escape.ml @@ -0,0 +1,15 @@ +(* TEST + * expect +*) + +let x = ref [] +module M = struct type t let _ = (x : t list ref) end;; +[%%expect{| +val x : '_weak1 list ref = {contents = []} +Line 2, characters 34-35: + module M = struct type t let _ = (x : t list ref) end;; + ^ +Error: This expression has type 'weak1 list ref + but an expression was expected of type t list ref + The type constructor t would escape its scope +|}] |