current develop build fails on Ubuntu 20.04 LTS
In file included from /home/hive/hive/libraries/chain/include/hive/chain/hive_objects.hpp:641,
from /home/hive/hive/libraries/chain/hive_evaluator.cpp:6:
/home/hive/hive/libraries/chain/include/hive/chain/comment_object.hpp: In member function ‘void hive::chain::comment_evaluator::do_apply(const hive::protocol::comment_operation&)’:
/home/hive/hive/libraries/chain/include/hive/chain/comment_object.hpp:47:43: error: ‘parent_comment.std::reference_wrapper<const hive::chain::comment_object>::_M_data’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
47 | uint16_t get_depth() const { return depth; }
| ^~~~~
/home/hive/hive/libraries/chain/hive_evaluator.cpp:852:68: note: ‘parent_comment.std::reference_wrapper<const hive::chain::comment_object>::_M_data’ was declared here
852 | fc::optional< std::reference_wrapper< const comment_object > > parent_comment;
| ^~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
make[3]: *** [libraries/chain/CMakeFiles/hive_chain.dir/build.make:141: libraries/chain/CMakeFiles/hive_chain.dir/hive_evaluator.cpp.o] Error 1
make[3]: *** Waiting for unfinished jobs....