Enable IPE backtraces on debugger by default #181
Description
It could be good to have IPE backtraces enabled by default for the debugger process.
This would be useful if a user runs into a debugger crash -- it means they'll have more information to report a bug.
On the other hand, that information would only be available if the user had compiled haskell-debugger with IPE information, which is unlikely.
In #170, I disabled IPE backtraces by default because enabling different backtrace options in the debugger and debuggee may result in different test outputs (if the debuggee is run with the external interpreter for instance)
This ticket tracks adding a runtime flag for enabling the IPE backtracks in the debugger. The testsuite should disable this flag to ensure consistent test outputs with and without external interpreter.