Removes MismatchedError message for ignored return values

Analysis/src/Error.cpp

@@ -122,12 +122,10 @@ struct ErrorConverter
             return "Expected to return " + std::to_string(e.expected) + " value" + expectedS + ", but " +
                    std::to_string(e.actual) + " " + actualVerb + " returned here";
         case CountMismatch::Result:
-            if (e.expected > e.actual)
-                return "Function returns " + std::to_string(e.expected) + " values, but there " + actualVerb +
-                       " only " + std::to_string(e.actual) + " value" + actualS + " to unpack into";
-            else
-                return "Function only returns " + std::to_string(e.expected) + " value" + expectedS + ". " +
-                       std::to_string(e.actual) + " are required here";
+            // It is alright if right hand side produces more values than the
+            // left hand side accepts. In this context consider only the opposite case.
+            return "Function only returns " + std::to_string(e.expected) + " value" + expectedS + ". " +
+                   std::to_string(e.actual) + " are required here";
         case CountMismatch::Arg:
             return "Argument count mismatch. Function " + wrongNumberOfArgsString(e.expected, e.actual);
         }

tests/TypeInfer.test.cpp

@@ -3256,7 +3256,7 @@ TEST_CASE_FIXTURE(Fixture, "too_many_return_values")
     CHECK_EQ(acm->actual, 2);
 }
 
-TEST_CASE_FIXTURE(Fixture, "not_enough_return_values")
+TEST_CASE_FIXTURE(Fixture, "ignored_return_values")
 {
     CheckResult result = check(R"(
         --!strict
@@ -3268,13 +3268,7 @@ TEST_CASE_FIXTURE(Fixture, "not_enough_return_values")
         local a = f()
     )");
 
-    LUAU_REQUIRE_ERROR_COUNT(1, result);
-
-    CountMismatch* acm = get<CountMismatch>(result.errors[0]);
-    REQUIRE(acm);
-    CHECK_EQ(acm->context, CountMismatch::Result);
-    CHECK_EQ(acm->expected, 2);
-    CHECK_EQ(acm->actual, 1);
+    LUAU_REQUIRE_ERROR_COUNT(0, result);
 }
 
 TEST_CASE_FIXTURE(Fixture, "function_does_not_return_enough_values")