Converter beans cannot be defined as lambdas

[Hoysing]

@Configuration
public class ConverterConfig {
    @Bean
    public Converter<String, LocalDate> localDateConverter() {
        return source -> LocalDate.parse(source, CommonConstants.DATE_FORMATTER);
//        return new Converter<String, LocalDate>() {
//            @Override
//            public LocalDate convert(String source) {
//                return LocalDate.parse(source, CommonConstants.DATE_FORMATTER);
//            }
//        };
    }
}

start app successfully when add converter without the lambda exp.otherwise,failed to start app and the following result will be outputted.
Can't spring boot infer the type from the lambda exp?

Caused by: java.lang.IllegalArgumentException: Unable to determine source type <S> and target type <T> for your Converter [org.hoysing.stress.converter.ConverterConfig$$Lambda$1601/1414642952]; does the class parameterize those types?

[Hoysing]

the version is 2.2.5

[philwebb]

We need to update ApplicationConversionService.addBeans to consider the factory method signature. We have some logic in ConfigurationPropertiesBean that could probably be extracted.

[philwebb]

Flagging for team attention to consider if we want to try and fix this as a bug, or consider it a known limitation and mark it as an enhancement.

[Hoysing]

ok.thanks!

[snicoll]

@philwebb don't we already have a PR about that? #22885

[philwebb]

Thanks @snicoll, I knew I'd seen this issue before but I couldn't find it. Closing as a duplicate of #22885