[Bug]: The compiler crashes when checking the equality between two XML values with interpolation

[nipunayf]

Description

A compiler crash with the following error is generated when attempting to check the equality between two XML values with interpolated variables.

[2024-01-16 11:46:24,697] SEVERE {b7a.log.crash} - class io.ballerina.runtime.internal.values.XmlSequence cannot be cast to class io.ballerina.runtime.internal.values.XmlText (io.ballerina.runtime.internal.values.XmlSequence and io.ballerina.runtime.internal.values.XmlText are in unnamed module of loader 'app') 
java.lang.ClassCastException: class io.ballerina.runtime.internal.values.XmlSequence cannot be cast to class io.ballerina.runtime.internal.values.XmlText (io.ballerina.runtime.internal.values.XmlSequence and io.ballerina.runtime.internal.values.XmlText are in unnamed module of loader 'app')
        at io.ballerina.runtime.internal.TypeChecker.checkValueEquals(TypeChecker.java:2992)
        at io.ballerina.runtime.internal.TypeChecker.isEqual(TypeChecker.java:2944)
        at io.ballerina.runtime.internal.TypeChecker.isEqual(TypeChecker.java:379)
        at err_xml_equality.main(err_xml_equality.bal:7)
        at $_init.$moduleExecute(.)
        at $_init.$lambda$$moduleExecute$(.)
        at io.ballerina.runtime.internal.scheduling.SchedulerItem.execute(SchedulerItem.java:54)
        at io.ballerina.runtime.internal.scheduling.Scheduler.run(Scheduler.java:306)
        at io.ballerina.runtime.internal.scheduling.Scheduler.runSafely(Scheduler.java:273)
        at java.base/java.lang.Thread.run(Thread.java:833)

Steps to Reproduce

Execute the following Ballerina code.

public function main() {
    string a = "hello";

    xml x1 = xml `AS-${a}`;
    xml x2 = xml `AS-${a}`;

    _ = x1 == x2;
}

Affected Version(s)

Ballerina 2201.8.4 (Swan Lake Update 8)`

OS, DB, other environment details and versions

OS: macOS 14.2.1 23C71
JDK: openjdk 17.0.8 2023-07-18

Related area

-> Compilation

Related issue(s) (optional)

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Suggested label(s) (optional)

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Suggested assignee(s) (optional)

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[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.