Quoted identifier of the error keyword results in compilation failure

[IrushiL]

Description:
$subject

Gives the following error:

ERROR [main.bal:(4:17,4:23)] redeclared builtin symbol 'error'

Steps to reproduce:

import ballerina/io;

// Compilation failure
public function 'error() {
    io:println("Hello World!");
}

// Works
public function 'int() {
    io:println("Hello World!");
}

Affected Versions:
Ballerina Swan Lake Alpha 4

OS, DB, other environment details and versions:

Related Issues (optional):
#23045

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