Hi swift-lldb-dev!
swift-lldb currently fails to compile with the most recent version of libstdc++ due to a missing include. This is already fixed in upstream lldb (see my comment on https://bugs.swift.org/browse/SR-4838\).
Since I am not familiar with the policy regarding merging upstream changes into swift-lldb, could someone more familiar take a look? Should be a pretty easy fix.
Thanks and best wishes,
Lukas