Solve constraints together and in the order they are added (#360)

* Solve named argument constraints when record type dereferencing fails

* Revert "Solve named argument constraints when record type dereferencing fails"

This reverts commit ca38a171a9eefdddbc3f6a41f8a268c42662cd7a.

* Solve constraints together and in order

* Fix dialyzer warnings

* Add comment on solve_known_record_types

* Remove unused function

test/aeso_compiler_tests.erl

@@ -168,6 +168,7 @@ compilable_contracts() ->
      "maps",
      "oracles",
      "remote_call",
+     "remote_call_ambiguous_record",
      "simple",
      "simple_storage",
      "spend_test",
@@ -676,7 +677,10 @@ failing_contracts() ->
          <<?Pos(15, 5)
            "Cannot unify bytes(26)\n"
            "         and bytes(25)\n"
-           "at line 15, column 5">>,
+           "when checking the type of the expression at line 15, column 5\n"
+           "  Bytes.concat(x, y) : bytes(26)\n"
+           "against the expected type\n"
+           "  bytes(25)">>,
          <<?Pos(17, 5)
            "Failed to resolve byte array lengths in call to Bytes.concat with arguments of type\n"
            "  - bytes(6)  (at line 16, column 24)\n"

test/contracts/remote_call_ambiguous_record.aes

@@ -0,0 +1,11 @@
+contract interface Coin =
+    entrypoint mint : () => int
+
+contract interface OtherCoin =
+    entrypoint mint : () => int
+
+main contract Main =
+    function mkCoin() : Coin = ct_11111111111111111111111111111115rHyByZ
+    entrypoint foo() : int =
+        let r = mkCoin()
+        r.mint()