Deserialize YML ignoring properties with lists

[marcan-bea]

Describe the bug Weird behavior when deserialize YML ignoring properties and having lists. When a list of values is in YML file, it stops deserialization of values that are defined after that. I tried the same code in Java and there was no problem.

To Reproduce

val objectMapper = ObjectMapper(YAMLFactory()).registerKotlinModule()
val testYml: TestYml = objectMapper.readValue(
      File(this.javaClass.classLoader.getResource("test_yml.yml").toURI()),
      TestYml::class.java
)

println(testYml.name)

@JsonIgnoreProperties(ignoreUnknown = true)
data class TestYml(
      val name: String?
)

When having test_yml.yml like:

name: containerNameTest
ports:
  - 3306

This works fine, we can see the value of "name".

When having test_yml.yml like:

ports:
  - 3306
name: containerNameTest

This doesn't work, "name" is null.

Expected behavior We should see value of "name" in both case.

Versions Kotlin: 1.4.20 Jackson-module-kotlin: 2.13.0-rc1 Jackson-databind: 2.13.0-rc1

[cowtowncoder]

This probably needs to go under jackson-dataformats-text repo. But if so, would need plain Java reproduction. I suspect this is not related to Kotlin.

One quick note tho: for testing, it's rarely if ever good to use this:

 @JsonIgnoreProperties(ignoreUnknown = true)

since that very often hides real issues.

[marcan-bea]

I tried with java doing:

public App() throws URISyntaxException, IOException {
      ObjectMapper objectMapper = new ObjectMapper(new YAMLFactory());

      File file = new File(this.getClass().getClassLoader().getResource("test_yml.yml").toURI());
      TestYml testYml = objectMapper.readValue(file, TestYml.class);

      System.out.println(testYml.getName());
}

public static void main(String[] args) throws URISyntaxException, IOException {
      new App();
}

@JsonIgnoreProperties(ignoreUnknown = true)
public static class TestYml {
      private String name;

      public String getName() {
            return this.name;
      }

      public void setName(String name) {
            this.name = name;
      }
}

And this is working fine in both case.