Same issue for me since the latest updates to Sequoia 15.4 and 16.2. Whenever I attach to a Simulator and try to view any variable, the LLDB RPC server crashes immediately. FB16682372 Debugging physical devices still seems to work fine.

Issue persists for me after updating to Sequoia 15.4 Beta 2, Xcode 16.2. I tried deleting all simulators and this did not help.