graphify/extractors/go.py already consults _LANGUAGE_BUILTIN_GLOBALS
when resolving a callee, but the table covered JS/TS, Python and Swift
(#726, #2147) and never Go. Because the Go resolver looks the callee up
by bare name, an unexported method sharing a builtin's name absorbs
every builtin call in the repository.
Measured on a real 8.9k-node Go+TS codebase: a
'func (h *metricHistory) append(...)' method collected 330 phantom
inbound calls edges from the project's ordinary append(slice, x) calls,
which in turn invented twelve database-layer -> service-layer edges —
a layering violation absent from the source. After the fix, phantom
cross-file edges to builtin-named nodes drop from 325 to zero; the 8
that remain are all same-file (struct -> method, and real calls to that
method), and the user's method node is untouched.
Builtin types are deliberately not listed. Go conversions are
call-shaped too, but they produced no phantom edges on that corpus and
listing them would suppress genuine constructor-like calls.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
