const runtime.waitReasonGCWorkerIdle

3 uses

	runtime (current package)
		mgc.go#L1818: 		}, unsafe.Pointer(node), waitReasonGCWorkerIdle, traceBlockSystemGoroutine, 0)
		runtime2.go#L1251: 	waitReasonGCWorkerIdle                            // "GC worker (idle)"
		runtime2.go#L1301: 	waitReasonGCWorkerIdle:          "GC worker (idle)",