runtime.mheap.cleanupID (field) 3 uses runtime (current package) mheap.go#L238: cleanupID uint64 mheap.go#L2043: mheap_.cleanupID++ mheap.go#L2044: id := mheap_.cleanupID
The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)