4 ,---- Stack trace -- - - -
5 | base_attr_nullable_alt5::Bar::(base_attr_nullable_alt5::Foo::run) (alt/base_attr_nullable_alt5.nit:62)
6 | base_attr_nullable_alt5::Bar::init (alt/base_attr_nullable_alt5.nit:69)
7 | base_attr_nullable_alt5::Sys::main (alt/base_attr_nullable_alt5.nit:81)
8 `------------------- - - -