Log Message:
-----------
Don't do equivalence check if prefilters are erased
Modified Files:
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pg/lib/Value:
AnswerChecker.pm
Revision Data
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Index: AnswerChecker.pm
===================================================================
RCS file: /webwork/cvs/system/pg/lib/Value/AnswerChecker.pm,v
retrieving revision 1.124
retrieving revision 1.125
diff -Llib/Value/AnswerChecker.pm -Llib/Value/AnswerChecker.pm -u -r1.124 -r1.125
--- lib/Value/AnswerChecker.pm
+++ lib/Value/AnswerChecker.pm
@@ -1648,6 +1648,7 @@
my $self = shift; my $ans = shift;
$ans->{_filter_name} = "produce_equivalence_message";
return $ans if $ans->{ans_message}; # don't overwrite other messages
+ return $ans unless defined($ans->{prev_ans}); # if prefilters are erased, don't do this check
my $context = $self->context;
$ans->{prev_formula} = Parser::Formula($context,$ans->{prev_ans});
if (defined($ans->{prev_formula}) && defined($ans->{student_formula})) {
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