haskell debugger not responding

I can start the debugger process and set or remove breakpoints but I can't use it properly.

If i start the debug and hit a breakpoint the interface shows the debugger's commands but I can't interact because the context is not updated and I see only the message "Context"

if I type "a" to abandon the context and refresh the interface I get "Finished debugging" and it shows the trace of the execution.

(i'm using cabal + ghc8)

Start by reproducing the debugger interaction with cabal and GHC 8: set a breakpoint, continue to it, and observe the "Context" message. Done means the interface updates at the breakpoint, accepts debugger commands without abandoning the context, and still shows the execution trace when debugging finishes.

Written by the indexing model from the issue text.