UnhandledPromiseRejectionWarning when using ProfilingPlugin on node 6

[skratchdot]

Bug report

What is the current behavior?
On node 6, run the following:

webpack --plugin webpack/lib/debug/ProfilingPlugin

The following warning is logged to the console:

UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: trace.destroy is not a function

On node 8, things work flawlessly (and the events.json is 80mb compared to 20mb).

Potentially need some additional logic here:
https://github.com/webpack/webpack/blob/master/lib/debug/ProfilingPlugin.js#L140

Or maybe just disable tracing for node 6 (or log a helpful warning message)?

I'm logging this due to: https://twitter.com/samccone/status/1014510041532022786

If the current behavior is a bug, please provide the steps to reproduce.
On node 6, run the following:

webpack --plugin webpack/lib/debug/ProfilingPlugin

What is the expected behavior?
Webpack build should complete with a full events.json, and no unhandled exceptions.

Other relevant information:
webpack version: 4.12.2
Node.js version: 6.14.1
Operating System: MacOS High Sierra 10.13.5
Additional tools:

[skratchdot]

Node 6 end-of-life is April '19, so not sure it's even worth "fixing" this: https://github.com/nodejs/Release#release-schedule

I'll do some reading about chrome-trace-event and node 6 tracing, and see if there's anything I can figure out.

[skratchdot]

This is just a node streams thing. destroy was added in v8: https://nodejs.org/api/stream.html#stream_writable_destroy_error

[sokra]

cc @samccone