Coverage report is missing uncovered files when using `--all` with `--include`

[wellwelwel]

When running the test suite of MySQL2 with c8 using --all combined with --include, some files that exist and match the include patterns become invisible in the coverage report when totally uncovered.

For context, here is the coverage configuration used:

{
  "all": true,
  "include": ["index.js", "promise.js", "lib/**/*.js"],
  "exclude": ["mysqldata/**", "node_modules/**", "test/**"],
  "reporter": ["text", "lcov", "cobertura"],
  "statements": 80,
  "branches": 80,
  "functions": 77,
  "lines": 80,
  "checkCoverage": true,
  "clean": true
}

However, lib/results_stream.js and lib/packets/binlog_query_statusvars.js don't appear in the report.

Expected behavior:

When bypassing c8's filtering (e.g., collecting V8 coverage data directly and calling Report programmatically) from my custom plugin that uses C8 behind the scenes, both files correctly appear with 0% coverage, confirming they exist and match the patterns.

Note

• I'm preparing a fix for this 🙋🏻‍♂️