[Bug]: CloneWithType throws conversion error with union type

[chiranSachintha]

Description

import ballerina/io;
import ballerinax/health.fhir.r4;

public type Extension r4:CodeableConceptExtension | r4:ExtensionExtension|r4:CodingExtension;


public function main() returns error? {
    json extCoding = {
        "valueCoding": {
            "system": "http://loinc.org",
            "code": "LA29518-0",
            "display": "he/him/his/himself"
        },
        "url": "http://open.epic.com/FHIR/StructureDefinition/extension/calculated-pronouns-to-use-for-text"
    };

    Extension ext = check extCoding.cloneWithType();
    io:print(ext);
}

The above program return error as

error: {ballerina/lang.value}ConversionError {"message":"'map<json>' value cannot be converted to 'health.fhir.r4:Element': 
                value of field 'system' adding to the record 'health.fhir.r4:Element' should be of type 'health.fhir.r4:Element', found '"http://loinc.org"'
                value of field 'code' adding to the record 'health.fhir.r4:Element' should be of type 'health.fhir.r4:Element', found '"LA29518-0"'
                value of field 'display' adding to the record 'health.fhir.r4:Element' should be of type 'health.fhir.r4:Element', found '"he/him/his/himself"'"}

When we change the type as

public type Extension r4:CodingExtension|r4:CodeableConceptExtension | r4:ExtensionExtension;

The above program works fine.

The issue arises when selecting a convertible type for extCoding variable.

ballerina-lang/bvm/ballerina-runtime/src/main/java/io/ballerina/runtime/internal/ValueConverter.java

Line 106 in b2c2c42

Type convertibleType = TypeConverter.getConvertibleType(value, targetType,

This works in version 2201.7.0 but gives error in version 2201.8.4.

Steps to Reproduce

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Affected Version(s)

2201.8.4

OS, DB, other environment details and versions

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Related area

-> Runtime

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