Report undefined interface errors before checking implemented interfaces

src/aeso_ast_infer_types.erl

@@ -855,6 +855,8 @@ infer1(Env, [{Contract, Ann, ConName, Impls, Code} | Rest], Acc, Options)
                                    _         -> ok
                                end
                   end, Impls),
+    destroy_and_report_type_errors(Env),
+    create_type_errors(),
     case What of
         contract ->
             ImplementedInterfaces = [proplists:get_value(Name, AllInterfaces) || Name <- ImplsNames],

test/aeso_compiler_tests.erl

@@ -844,6 +844,10 @@ failing_contracts() ->
                      "Unimplemented function f from the interface J in the contract C">>
                   ])
     , ?TYPE_ERROR(contract_polymorphism_undefined_interface,
+                  [<<?Pos(1,14)
+                     "Trying to implement or extend an undefined interface I at line 1, column 14">>
+                  ])
+    , ?TYPE_ERROR(contract_interface_polymorphism_undefined_interface,
                   [<<?Pos(1,24)
                      "Trying to implement or extend an undefined interface H at line 1, column 24">>
                   ])

test/contracts/contract_interface_polymorphism_undefined_interface.aes

@@ -0,0 +1,5 @@
+contract interface I : H =
+    entrypoint f : () => unit
+
+contract C =
+    entrypoint g() = ()

test/contracts/contract_polymorphism_undefined_interface.aes

@@ -1,5 +1,2 @@
-contract interface I : H =
+contract C : I =
-    entrypoint f : () => unit
+    entrypoint f() = ()
-
-contract C =
-    entrypoint g() = ()