Hello Stephan,
In the work for my thesis, I'm building a debugger for big data applications, that when a bug happens doesn't stop the computation but proceeds evaluating the next data. This opens a series of debuggers in separate threads, that are shown one by one. I added a button that allows me to restart and automatically proceed all the waiting debuggers from a certain point of the stack (assuming that the stack has the same "shape"), so basically after I fix a bug in the first debugger I can say to the others: ok, the bug is solved, restart yorself and proceed.
The thing seems more or less to work, except some details that I still have to implement.
Matteo