[Bug]: NPE thrown for cause() calls for errors created from API

[HindujaB]

Description

$subject
Happening for

ballerina-lang/bvm/ballerina-runtime/src/main/java/io/ballerina/runtime/api/creators/ErrorCreator.java

Line 93 in 187079a

public static BError createError(BString message, Throwable throwable) {

API usage.

Steps to Reproduce

In bal source,

error err = error_utils:getNullDetailError("error message");
error? c = err.cause(); // crashes with NPE

public function getNullDetailError(string msg) returns error = @java:Method {
    'class: "..."
} external;

In native code,

    public static BError getNullDetailError(BString msg) {
        return ErrorCreator.createError(msg, new NullPointerException("NPE"));
    }

Affected Version(s)

2201.8.5

OS, DB, other environment details and versions

No response

Related area

-> Runtime

Related issue(s) (optional)

https://github.com/wso2-enterprise/internal-support-ballerina/issues/608

Suggested label(s) (optional)

No response

Suggested assignee(s) (optional)

No response

[github-actions]

This issue is NOT closed with a proper Reason/ label. Make sure to add proper reason label before closing. Please add or leave a comment with the proper reason label now.

      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.