const runtime.waitReasonGCWorkerIdle

3 uses

	runtime (current package)
		mgc.go#L1490: 		}, unsafe.Pointer(node), waitReasonGCWorkerIdle, traceBlockSystemGoroutine, 0)
		runtime2.go#L1084: 	waitReasonGCWorkerIdle                            // "GC worker (idle)"
		runtime2.go#L1134: 	waitReasonGCWorkerIdle:          "GC worker (idle)",