Unexpected removal of function name from node:internal frame in stack trace

[Krinkle]

console.log(new Error('Boo').stack);

Node.js v23.6.0

$ node example.js
Error: boo
    at Object.<anonymous> (/Users/krinkle/Development/qunit/example.js:1:13)
    at Module._compile (node:internal/modules/cjs/loader:1739:14)
    at Object..js (node:internal/modules/cjs/loader:1904:10)
    at Module.load (node:internal/modules/cjs/loader:1473:32)
    at Function._load (node:internal/modules/cjs/loader:1285:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:234:24)

nyc 17.1.0

$ npx nyc node example.js 
Error: boo
    at Object.<anonymous> (/Users/krinkle/Development/qunit/example.js:1:13)
    at Module._compile (node:internal/modules/cjs/loader:1739:14)
    at Module.replacementCompile (/Users/krinkle/Development/qunit/node_modules/append-transform/index.js:60:13)
    at node:internal/modules/cjs/loader:1904:10
    at Object.<anonymous> (/Users/krinkle/Development/qunit/node_modules/append-transform/index.js:64:4)
    at Module.load (node:internal/modules/cjs/loader:1473:32)
    at Function._load (node:internal/modules/cjs/loader:1285:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:234:24)

The corrupted line in question is:

at Object..js (node:internal/modules/cjs/loader)

which nyc turns into

at node:internal/modules/cjs/loader

thus the at functionName (path/file) formatting structure, and becoming at path/file instead.

This caused a very minor issue in a project with strict output fixtures that, despite various normalization layers, failed to match with NYC enabled because it was unable to parse those lines correctly.

https://github.com/qunitjs/qunit/blob/3.0.0-alpha.4/test/cli/helpers/execute.js#L35-L53

[Krinkle]

In case it is specific to some versions or OS, I pulled an isolated example through GitHub CI at
https://github.com/Krinkle/sandbox/tree/nyc-stack-bug-2025.

• Node.js 20 on Linux, macOS, Windows: OK
• Node.js 22 on Linux, macOS, Windows: BUG
• Node.js 23 on Linux, macOS, Windows: BUG

https://github.com/Krinkle/sandbox/actions/runs/12945508832/job/36108207401

It seems specific to Node.js 22 and later.

On Node.js 20 the affected frame looked like this:

at Module._extensions..js (node:internal/modules/cjs/loader:1548:10)

which is left alone.