const runtime.waitReasonGCWorkerIdle

3 uses

	runtime (current package)
		mgc.go#L1938: 		}, unsafe.Pointer(node), waitReasonGCWorkerIdle, traceEvGoBlock, 0)
		runtime2.go#L1012: 	waitReasonGCWorkerIdle                            // "GC worker (idle)"
		runtime2.go#L1042: 	waitReasonGCWorkerIdle:          "GC worker (idle)",