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use bigint;
$ perl -Mbigint -le 'print log(2)' Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/5 +.8.8/Math/BigInt/Calc.pm line 1338.
$ perl -Mbigint=t -le 'print log(2)' MBI imp +ort Math::BigInt::Trace :constant MBI new '2' => '2' (Math::BigInt::Trace) Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/5 +.8.8/Math/BigInt/Calc.pm line 1338.