ADDITIONAL SYSTEM INFORMATION :
% java -version
openjdk version "14.0.1" 2020-04-14
OpenJDK Runtime Environment AdoptOpenJDK (build 14.0.1+7)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 14.0.1+7, mixed mode, sharing)


% sw_vers
ProductName: Mac OS X
ProductVersion: 10.15.4
BuildVersion: 19E287

A DESCRIPTION OF THE PROBLEM :
Constructor.getAnnotationParameters() being used for a Record completly ignores and does not return annotations with @Target(ElementType.FIELD).


That lead to potential problems with using a 3rd party libraries, like Jackson. As an example due to this issue record components annotated with @JsonIgnore(https://fasterxml.github.io/jackson-annotations/javadoc/2.5/com/fasterxml/jackson/annotation/JsonIgnore.html) can't be properly ignored.


REGRESSION : Last worked in version 14ea


---------- BEGIN SOURCE ----------
public class RecordAnnotationsTest {

    @Target(ElementType.PARAMETER)
    @Retention(RetentionPolicy.RUNTIME)
    public @interface A {
    }

    @Target(ElementType.FIELD)
    @Retention(RetentionPolicy.RUNTIME)
    public @interface B {
    }

    public static class Foo {
        public Foo( @A String message ) {
        }
    }

    public record Bar (@A String message) {}

    public record Baz (@B String message) {}

    @Test
    public void ensureThatGetParameterAnnotationsWorksForRecordProperly () {
        Constructor<?>[] csFoo = Foo.class.getConstructors();
        Constructor<?> cFoo = csFoo[0];
        Annotation[][] paFoo = cFoo.getParameterAnnotations();

        Constructor<?>[] csBar = Bar.class.getConstructors();
        Constructor<?> cBar = csBar[0];
        Annotation[][] paBar = cBar.getParameterAnnotations();


        Assert.assertEquals( paFoo[0].length, paBar[0].length);

        Constructor<?>[] csBaz = Baz.class.getConstructors();
        Constructor<?> cBaz = csBaz[0];
        Annotation[][] paBaz = cBaz.getParameterAnnotations();

        Assert.assertEquals("ElementType.FIELD should be considered for records", paBar[0].length, paBaz[0].length);

    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Considering the follwing two facts:

(1) Record components in the same time are:
    - constructor parameters, in accordance to the declaration;
        - fields, by the nature and observable behavior.
(2) Since the code from provided test case is legitimate and it does not produce compilation errors, compiler allows usage of @Target(ElementType.FIELD) and @Target(ElementType.PARAMETER) for record components.

 As workaround it should be enough to return annotations with @Target(ElementType.FIELD).


FREQUENCY : always