I just updated to fedora 9 (in the middle of the semester, like a noob)
to realize that perl 5.10.x creates warning messages like
>> Useless use of a constant in void context at /opt/webwork/pg/lib/WeBWorK/EquationCache.pm line 42
An update to pg-2.4.5 eliminated the above problem but introduced the following new warning for function checking:
The simple problem
BEGIN_TEXT
Enter function "x" \{ans_rule(10)\}END_TEXT
$fun="x";
ANS(fun_cmp($fun));
Creates the following warning after entering anything as answer:
Use of uninitialized value in pattern match (m//) at line 1039 of [PG]/macros/PGfunctionevaluators.plOtherwise everything else seems to work correctly.
The above mentioned line contains
and $rh_ans->{ans_equals_prev_ans} # equivalent
Andras