Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.

Error: Sidef, Sidef::Deparse::Perl, Sidef::Deparse::Sidef, Sidef::Math::Math, Sidef::Module::Func, Sidef::Module::OO, Sidef::Object::Convert, Sidef::Object::Enumerator, Sidef::Object::Lazy, Sidef::Object::LazyMethod, Sidef::Object::Object, Sidef::Optimizer, Sidef::Parser, Sidef::Sys::Sig, Sidef::Sys::Sys, Sidef::Time::Date, Sidef::Time::Time, Sidef::Types::Array::Array, Sidef::Types::Array::Matrix, Sidef::Types::Array::Pair, Sidef::Types::Array::Vector, Sidef::Types::Block::Block, Sidef::Types::Block::Fork, Sidef::Types::Block::Try, Sidef::Types::Bool::Bool, Sidef::Types::Glob::Backtick, Sidef::Types::Glob::Dir, Sidef::Types::Glob::DirHandle, Sidef::Types::Glob::File, Sidef::Types::Glob::FileHandle, Sidef::Types::Glob::Pipe, Sidef::Types::Glob::Socket, Sidef::Types::Glob::SocketHandle, Sidef::Types::Glob::Stat, Sidef::Types::Hash::Hash, Sidef::Types::Null::Null, Sidef::Types::Number::Complex, Sidef::Types::Number::Fraction, Sidef::Types::Number::Gauss, Sidef::Types::Number::Mod, Sidef::Types::Number::Number, Sidef::Types::Number::Polynomial, Sidef::Types::Number::PolynomialMod, Sidef::Types::Number::Quadratic, Sidef::Types::Number::Quaternion, Sidef::Types::Perl::Perl, Sidef::Types::Range::Range, Sidef::Types::Range::RangeNumber, Sidef::Types::Range::RangeString, Sidef::Types::Regex::Match, Sidef::Types::Regex::Regex, Sidef::Types::Set::Bag, Sidef::Types::Set::Set, Sidef::Types::String::String, Sidef::Variable::GetOpt, Sidef::Variable::NamedParam