runtime.mheap.cleanupID (field) 3 uses runtime (current package) mheap.go#L253: cleanupID uint64 mheap.go#L2218: mheap_.cleanupID++ // Increment first. ID 0 is reserved. mheap.go#L2219: id := mheap_.cleanupID
The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)