--experimental-test-coverage empty since 23.5.0

### Version v24.1.0 ### Platform ```text Darwin 24.4.0 Darwin Kernel Version 24.4.0: Fri Apr 11 18:34:14 PDT 2025; root:xnu-11417.101.15~117/RELEASE_ARM64_T8122 arm64 ``` ### Subsystem test ### What steps will reproduce the bug? ```js import { test } from 'node:test' console.log(process.versions.node) test('foo', () => { if (false) { throw new Error('Failed') } else { // pass } }) ``` ```console % node --experimental-test-coverage --test i.js 24.1.0 ✔ foo (0.502334ms) ℹ tests 1 ℹ suites 0 ℹ pass 1 ℹ fail 0 ℹ cancelled 0 ℹ skipped 0 ℹ todo 0 ℹ duration_ms 57.841208 ℹ start of coverage report ℹ ---------------------------------------------------------- ℹ file | line % | branch % | funcs % | uncovered lines ℹ ---------------------------------------------------------- ℹ ---------------------------------------------------------- ℹ all files | 100.00 | 100.00 | 100.00 | ℹ ---------------------------------------------------------- ℹ end of coverage report ``` Since 23.5.0: ```console % nvm use 23.5 Now using node v23.5.0 (npm v10.9.2) % node --experimental-test-coverage --test i.js 23.5.0 ✔ foo (0.330042ms) ℹ tests 1 ℹ suites 0 ℹ pass 1 ℹ fail 0 ℹ cancelled 0 ℹ skipped 0 ℹ todo 0 ℹ duration_ms 64.134167 ℹ start of coverage report ℹ ----------------------------------------------------- ℹ file | line % | branch % | funcs % | uncovered lines ℹ ----------------------------------------------------- ℹ ----------------------------------------------------- ℹ …les | 100.00 | 100.00 | 100.00 | ℹ ----------------------------------------------------- ℹ end of coverage report ``` 23.4.0 was fine: ```console % nvm use 23.4 Now using node v23.4.0 (npm v10.9.2) % node --experimental-test-coverage --test i.js 23.4.0 ✔ foo (0.326084ms) ℹ tests 1 ℹ suites 0 ℹ pass 1 ℹ fail 0 ℹ cancelled 0 ℹ skipped 0 ℹ todo 0 ℹ duration_ms 62.499375 ℹ start of coverage report ℹ ------------------------------------------------------- ℹ file | l…