Already reviewed but PR is just sitting there. Not sure if it is suitable for this thread but worth a try.
panicgh
2933
Posted here 3 weeks ago, but nobody has reviewed it yet. All unit and package tests still pass.
Trying my luck here again 
The debugger got a little bitrotty, put in some fixes and a bit of testing. Order of traces matches the --show-trace output now too.
mmlb
2947
Reposting this since it looks to have been missed and I’ve bumped it up to v1.6.0.