Legacy JSON debug API removed as of V8 5.8

[hashseed]

This has been announced several times in the past two years [0][1]. Now that v8-inspector has taken over as a viable alternative, the old and unmaintained JSON debug API is now finally being removed from V8 [2]. I suggest migrating over to the inspector protocol if your tool talks to node/v8 via the legacy JSON debug API.

[0] https://docs.google.com/document/d/1M8DdgDldglYjQJ1mu0yBzwgR6lCX-ZKS_hxAJiCLT34/edit
[1] https://github.com/v8/v8/wiki/Debugging-Protocol
[2] https://chromium.googlesource.com/v8/v8/+/81a64aa5488602e4643f1ecc3beeddb8828a853c

[ofrobots]

/cc @nodejs/diagnostics @nodejs/v8.

[Fishrock123]

Oh shoot was this the original issue, whoops I guess it was around the code-and-learn and no-one saw it. :(

[joshgav]

FYI - Per @ofrobots here, removal of the old debug implementation has been deferred till V8 5.8.

Per #10117 It hasn't yet been decided (as of Jan 9) whether Node@8 will ship with V8 5.7 or 5.8.