Under the hood, it invokes inspect, which may trigger Active Record queries, which could be gated by a timeout thread - ultimately causing the debugger to hang forever.
This PR just ensures that threads are restarted for the backtrace command, so that we never get into a situation where the debugger is stuck.
Description
In https://github.com/ruby/debug/commit/3255b7124a0abe20c780f5ae7fba11c3ff690de3, many commands were changed to unfreeze threads to prevent the debugger from hanging. However, the same can occur when running
backtrace.Under the hood, it invokes
inspect, which may trigger Active Record queries, which could be gated by a timeout thread - ultimately causing the debugger to hang forever.This PR just ensures that threads are restarted for the backtrace command, so that we never get into a situation where the debugger is stuck.