plandex-ai/plandex · error

panic in GenPipedDataName: %v %s

Error message

panic in GenPipedDataName: %v
%s

What it means

A panic occurred inside the goroutine calling model.GenPipedDataName; the deferred recover() captures it and converts it into an error carrying the panic value and a debug.Stack() trace, sent to errCh.

Source

Thrown at app/server/handlers/context_helper.go:154

				log.Printf("Error loading context: %s does not support images in context\n", settings.GetModelPack().Planner.ModelId)
				http.Error(w, fmt.Sprintf("Error loading context: %s does not support images in context", settings.GetModelPack().Planner.ModelId), http.StatusBadRequest)
				return nil, nil
			}
		}
	}

	// get name for piped data or notes if present
	num := 0
	errCh := make(chan error, len(*loadReq))
	for _, context := range *loadReq {
		if context.ContextType == shared.ContextPipedDataType {
			num++

			go func(context *shared.LoadContextParams) {
				defer func() {
					if r := recover(); r != nil {
						log.Printf("panic in GenPipedDataName: %v\n%s", r, debug.Stack())
						errCh <- fmt.Errorf("panic in GenPipedDataName: %v\n%s", r, debug.Stack())
						runtime.Goexit() // don't allow outer function to continue and double-send to channel
					}
				}()

				name, err := model.GenPipedDataName(model.GenPipedDataNameParams{
					Ctx:           r.Context(),
					Auth:          auth,
					Plan:          plan,
					Settings:      settings,
					AuthVars:      authVars,
					SessionId:     context.SessionId,
					Clients:       clients,
					PipedContent:  context.Body,
					OrgUserConfig: orgUserConfig,
				})

				if err != nil {
					errCh <- fmt.Errorf("error generating name for piped data: %v", err)

View on GitHub (pinned to e2d772072e)

Solutions

  1. Read the embedded debug.Stack() in the error to find the panic site
  2. Check which goroutine input was nil or malformed (Body, clients, orgUserConfig)
  3. Pre-validate piped content shape before dispatching goroutines
  4. Update/patch the model code at the panic site to handle the offending input

Example fix

// before
defer func() {
	if r := recover(); r != nil {
		errCh <- fmt.Errorf("panic in GenPipedDataName: %v\n%s", r, debug.Stack())
		runtime.Goexit()
	}
}()
// after
// keep recover, but guard inputs before spawning:
if context == nil || context.Body == nil {
	errCh <- fmt.Errorf("invalid piped data context: nil body")
	return
}
Defensive patterns

Strategy: try-catch

Validate before calling

// guard inputs before dispatching the naming goroutine
if context == nil || context.Body == nil {
	return errors.New("piped data context or body is nil")
}

Type guard

func validPipedContext(c *shared.LoadContextParams) bool {
	return c != nil && c.Body != nil
}

Try / catch

// errors arrive via errCh
for range contexts {
	if err := <-errCh; err != nil {
		if strings.HasPrefix(err.Error(), "panic in GenPipedDataName") {
			log.Printf("naming panicked, stack: %s", err.Error())
			continue // skip item rather than failing whole request
		}
		return err
	}
}

Prevention

When it happens

Trigger: A worker goroutine for piped-data naming panics — e.g. nil dereference in context.Body handling, unexpected piped content type, or a nil client/OrgUserConfig reaching the model.

Common situations: Unusual piped content (binary, deeply nested attachments) tripping model code; nil pointer when Body or clients are unset; model version change introducing a panic path on new content shapes.

Related errors

AI-assisted analysis of plandex-ai/plandex@e2d772072e (2026-09-05). Data as JSON: /api/errors/756c88e6ffd65a2c. Report an issue: GitHub.