From rev#83136, the debuggee won't exit in the reported situation. When we have a melted invariant, the debugger won't try to get the stack values (mainly object test locals for invariant), and instead it will display an error in the debugger's grid. This is a acceptable fix for now, we will provide a better fix in the future involving changes in runtime and generated bytecode, however this is postponed after the 6.6 release to avoid introducing any new issue. This report is marked as suspended, and moved to "runtime" category