Bringup waits for nothing (no sleeps, no link waits, SETs fire cable-or-not with advert readback), errors held off the display while a measure is in flight, status poll is a deadline not a retry count, ghost signals (implausible SNR, undefined ECD verdict) panic outright; persistent stale-pipeline bridge fact documented

main.go

@@ -299,6 +299,19 @@ func (d *direction) counters(now counterSet) view {
 	}
 }
 
+// Errors seen while a measure is in flight are the diag's own link blip and
+// are re-based away at its completion; until then they are held off the
+// display rather than shown as the cable's.
+func measureView(diag *cableDiag, modules []*phyModule, v view) (view, phyDisplay) {
+	info, measuring := diag.snapshot()
+	phy := phyDisplayFrom(info, measuring, modules[0].view(), modules[1].view())
+	if measuring {
+		v.window, v.since = errs{}, errs{}
+		phy.corrected, phy.recent = 0, 0
+	}
+	return v, phy
+}
+
 func totalView(views []view) view {
 	var t view
 	for _, v := range views {
@@ -769,9 +782,8 @@ func run(aName, bName string) (err error) {
 			for i, d := range dirs {
 				views[i] = d.displayView()
 			}
-			info, measuring := diag.snapshot()
-			phy := phyDisplayFrom(info, measuring, modules[0].view(), modules[1].view())
-			if err := disp.render(totalView(views), now.Sub(start), phy,
+			v, phy := measureView(diag, modules, totalView(views))
+			if err := disp.render(v, now.Sub(start), phy,
 				noise.missing()); err != nil {
 				return err
 			}
@@ -780,9 +792,8 @@ func run(aName, bName string) (err error) {
 			for i, d := range dirs {
 				rows[i] = d.displayView()
 			}
-			info, measuring := diag.snapshot()
-			phy := phyDisplayFrom(info, measuring, modules[0].view(), modules[1].view())
-			for _, line := range stats.emit(totalRow(elapsed, totalView(rows), target, phy,
+			v, phy := measureView(diag, modules, totalView(rows))
+			for _, line := range stats.emit(totalRow(elapsed, v, target, phy,
 				noise.missing())) {
 				fmt.Println(line)
 			}