WIP: failed to make must sense of the error trapping.

caschat.php

question.php

questiontestedit.php

questiontestrun.php

stack/answertest/at_general_cas.class.php

stack/cas/ast.container.class.php

stack/cas/ast.container.silent.class.php

stack/cas/cassession2.class.php

stack/cas/parsingrules/990_no_fixing_spaces.filter.php

stack/cas/parsingrules/991_no_fixing_stars.filter.php

stack/input/equiv/equiv.class.php

stack/input/textarea/textarea.class.php

stack/potentialresponsenode.class.php

stack/questiontest.php