Node agent: count a module running a build of the old form as held today, so the seed keeps it as the controller does (issue 1126)

internal/selfcompose/shadow.go

@@ -40,7 +40,8 @@ type Shadow struct {
 	// ran is, by module, the digest the module's have says runs: what runs, where the agent's list holds only the copy
 	// from the declaration kept before the switch (issue 1126, probe #532 on shanks).
 	ran map[string]string
-	// heldNow is, by module, whether its have says the node holds it today (phase held): a candidate holding it too holds
+	// heldNow is, by module, whether its have says the node holds it today (phase held, or a build of the old form it runs
+	// as the controller keeps it): a candidate holding it too holds
 	// it as today (frombus.Scope.HeldToday, issue 1126).
 	heldNow map[string]bool
 	// answered is, by proposal, the candidate revisions and the input changes (moved) each answer was composed at: a proposal
@@ -664,7 +665,11 @@ func (s *Shadow) takeRan(u agent.Update) bool {
 		s.heldNow = map[string]bool{}
 	}
 	wasHeld := s.heldNow[module]
-	s.heldNow[module] = !u.Deleted && err == nil && h.Phase == delivery.PhaseHeld
+	// Held today: its have's phase is held, or it runs a build of the old form (not src2:), which no registered build of
+	// the trunk names, so the controller keeps it as it runs (issue 1126: novox's de-spiegel at build-…, its newer build
+	// not registered); a seed keeps it so too.
+	s.heldNow[module] = !u.Deleted && err == nil && h.Phase != delivery.PhaseRemoved &&
+		(h.Phase == delivery.PhaseHeld || (h.FP != "" && !strings.HasPrefix(h.FP, delivery.SourcePrefix2)))
 	holdMoved := wasHeld != s.heldNow[module] // a hold's start or end changes the answer too
 	if u.Deleted || err != nil || h.Composed == "" || h.Phase == delivery.PhaseRemoved {
 		delete(s.ran, module)