const runtime.waitReasonGarbageCollection

3 uses

	runtime (current package)
		mgc.go#L922: 	gp.waitreason = waitReasonGarbageCollection
		runtime2.go#L1021: 	waitReasonGarbageCollection                       // "garbage collection"
		runtime2.go#L1051: 	waitReasonGarbageCollection:     "garbage collection",