Bug fix: when evaluating 'Dao.Interpreter.objectReferenceAccess ' backtracking was being caught and re-thrown as an exception. However throwing an exception for this reason is incorrect behavior because it is expected that 'Dao.Inerpreter.referenceLookup' function is supposed to catch backtracking and returning 'Prelude.Nothing'. The built-in function "defined()" depends on this. I removed backtrack catching and exception throwing code from the 'Dao.Interpreter.objectReferenceAccess' function, and now the "defined()" function works as expected.
Bug fix: when evaluating 'Dao.Interpreter.objectReferenceAccess '
backtracking was being caught and re-thrown as an exception. However
throwing an exception for this reason is incorrect behavior because it
is expected that 'Dao.Inerpreter.referenceLookup' function is supposed
to catch backtracking and returning 'Prelude.Nothing'. The built-in
function "defined()" depends on this. I removed backtrack catching and
exception throwing code from the 'Dao.Interpreter.objectReferenceAccess'
function, and now the "defined()" function works as expected.

printedheart/Dao