./submodules/ocean/src/ocean/core/SmartUnion.d(549): Warning: calling `ocean.core.SmartUnion.SmartUnion!(HasDuplicates).SmartUnion.opCall` without side effects discards return value of type `SmartUnion!(HasDuplicates)`; prepend a `cast(void)` if intentional
Buildkite fails on this dmd PR: https://github.com/dlang/dmd/pull/12890