The `AbstractXContentFilteringTestCase#testDotsAndDoubleWildcardInExcludedFieldName` test (all subclasses) is failing. It is no longer failing due to invalid JSON (that was fixed by the upgrade to jackson 2.13.0), but it looks like it is failing to apply exclusions correctly.
libs/x-content/src/test/java/org/elasticsearch/xcontent/support/filtering/AbstractXContentFilteringTestCase.java
singleton("foo.bar"),
            emptySet(),
            false
        );
    }
    public void testDotInIncludedFieldNameConfigured() throws IOException {
        testFilter(
            builder -> builder.startObject().field("foo.bar", "test").endObject(),
            builder -> builder.startObject().field("foo.bar", "test").endObject(),
            singleton("foo.bar"),
            emptySet(),
            true
        );
    }
    public void testDotInExcludedFieldNameUnconfigured() throws IOException {
        testFilter(
            builder -> builder.startObject().field("foo.bar", "test").endObject(),
            builder -> builder.startObject().field("foo.bar", "test").endObject(),
            emptySet(),
            singleton("foo.bar"),
            false
        );
    }
    public void testDotInExcludedFieldNameConfigured() throws IOException {
        testFilter(
            builder -> builder.startObject().endObject(),
            builder -> builder.startObject().field("foo.bar", "test").endObject(),
            emptySet(),
            singleton("foo.bar"),
            true