inspector.url()/open() does not work if NODE_V8_COVERAGE is set

[connor4312]

Version

v19.3.0

Platform

Darwin MacBook-Pro-2.guest.corp.microsoft.com 22.2.0 Darwin Kernel Version 22.2.0: Fri Nov 11 02:08:47 PST 2022; root:xnu-8792.61.2~4/RELEASE_X86_64 x86_64

Subsystem

inspector

What steps will reproduce the bug?

$ NODE_V8_COVERAGE=/tmp node -p "inspector.url()"
undefined
$ NODE_V8_COVERAGE=/tmp node -p "inspector.open()"
node:inspector:172
    throw new ERR_INSPECTOR_ALREADY_ACTIVATED();

How often does it reproduce? Is there a required condition?

100%

What is the expected behavior?

I would expect, regardless of whether NODE_V8_COVERAGE is set, to be able to inspector.open() if there is no inspector.url(), and then after calling that be able to access inspector.url()

What do you see instead?

If NODE_V8_COVERAGE is set, inspector.url() is undefined but inspector.open() throws an error.

Additional information

Originally reported on microsoft/vscode-js-debug#1507

It looks like new inspector.Session().connect() does still work in case, so we could 'fake' the inspect server as a workaround, but this is a complex hack.

[MoLow]

a workaround (until it is fixed) is adding --inspect :
NODE_V8_COVERAGE=/tmp node --inspect -p "inspector.url()"

[connor4312]

Unfortunately in my case, the subprocess with NODE_V8_COVERAGE is spawned by c8, which the VS Code Debugger does not control.