Could not report code coverage for file in sourcemap #55054

Version

v22.9.0

Platform

N/A

Subsystem

test_runner

What steps will reproduce the bug?

Create index.mjs:

export {}
//# sourceMappingURL=index.mjs.map

Create index.mjs.map:

{"version":3,"file":"index.mjs","sourceRoot":"","sources":["index.mjs"],"names":[],"mappings":"AAEA"}

Run:

node --experimental-test-coverage --test index.mjs

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

Every time.

What is the expected behavior? Why is that the expected behavior?

Coverage should be reported, or an error explaining why it wasn't is displayed.

What do you see instead?

ℹ Warning: Could not report code coverage. TypeError: Cannot read properties of undefined (reading 'startOffset')

Additional information

CC @nodejs/test_runner