const runtime.waitReasonGarbageCollection

4 uses

	runtime (current package)
		mgc.go#L1033: 	casGToWaitingForSuspendG(curgp, _Grunning, waitReasonGarbageCollection)
		runtime2.go#L1050: 	waitReasonGarbageCollection                       // "garbage collection"
		runtime2.go#L1097: 	waitReasonGarbageCollection:     "garbage collection",
		runtime2.go#L1163: 	waitReasonGarbageCollection:     true,