Unable to get coverage for files executed via runInThisContext

[Jelle De Loecker]

Link to bug demonstration repository

Here's the repository:
https://github.com/11ways/protoblast

I load most files via the vm module's runInThisContext.
With a filename option.

Expected Behavior

Running the coverage script should generate coverage for the files loaded this way.

Observed Behavior

It only shows coverage for the files executed via the require function.

Environment Information

  System:
    OS: Linux 6.6 Arch Linux
    CPU: (16) x64 AMD Ryzen 7 3800X 8-Core Processor
    Memory: 35.82 GB / 62.72 GB
  Binaries:
    Node: 20.8.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.1.0 - /usr/local/bin/npm
    pnpm: 7.24.3 - /usr/local/bin/pnpm
    bun: 1.0.6 - ~/.bun/bin/bun
  npmPackages:
    istanbul-lib-instrument: ~4.0.3 => 4.0.3
    nyc: ^15.1.0 => 15.1.0

[Jelle De Loecker]

Couldn't get this to work in nyc, but I discovered the c8 package (which is actively maintained) and it works fine in there!