wagoodman/dive · error

controller unable to switch to previous pane

Error message

controller unable to switch to previous pane: %w

What it means

Mirror of error 28 for PrevPane(): it cycles focus in reverse (Layer -> ImageDetails -> LayerDetails -> Layer) and wraps a failure of gocui SetCurrentView() when the target pane view cannot be made current. Same failure surface as NextPane, opposite direction.

Solutions

1. Let the TUI finish its initial layout before switching panes.
2. Keep the terminal at a reasonable size; avoid minimizing/restoring mid-session.
3. Upgrade dive to pick up view-lifecycle fixes.
4. Reproduce with debug logging and report upstream if repeatable.

When it happens

Trigger: Pressing the previous-pane keybinding when the destination view is not registered with the gui (startup race, torn-down layout), producing a non-nil error from SetCurrentView.

Common situations: Fast keyboard input at startup; terminal resize destroying views; inconsistent view registration in modified builds.

Related errors

• controller unable to switch to next pane
• controller unable to toggle view
• unable to toggle filter view (back)
• controller failed render
• controller failed update

AI-assisted analysis of wagoodman/dive@d6c691947f (2026-08-15). Data as JSON: /api/errors/03fca7597a745767. Report an issue: GitHub.

Appendix: source

Thrown at cmd/dive/cli/internal/ui/v1/app/controller.go:195

//nolint:dupl
func (c *controller) PrevPane() (err error) {
	v := c.gui.CurrentView()
	if v == nil {
		panic("Current view is nil")
	}
	if v.Name() == c.views.Layer.Name() {
		_, err = c.gui.SetCurrentView(c.views.ImageDetails.Name())
		c.views.Status.SetCurrentView(c.views.ImageDetails)
	} else if v.Name() == c.views.LayerDetails.Name() {
		_, err = c.gui.SetCurrentView(c.views.Layer.Name())
		c.views.Status.SetCurrentView(c.views.Layer)
	} else if v.Name() == c.views.ImageDetails.Name() {
		_, err = c.gui.SetCurrentView(c.views.LayerDetails.Name())
		c.views.Status.SetCurrentView(c.views.LayerDetails)
	}

	if err != nil {
		return fmt.Errorf("controller unable to switch to previous pane: %w", err)
	}

	return c.UpdateAndRender()
}

// ToggleView switches between the file view and the layer view and re-renders the screen.
func (c *controller) ToggleView() (err error) {
	v := c.gui.CurrentView()
	if v == nil || v.Name() == c.views.Layer.Name() {
		_, err = c.gui.SetCurrentView(c.views.Tree.Name())
		c.views.Status.SetCurrentView(c.views.Tree)
	} else {
		_, err = c.gui.SetCurrentView(c.views.Layer.Name())
		c.views.Status.SetCurrentView(c.views.Layer)
	}

	if err != nil {
		return fmt.Errorf("controller unable to toggle view: %w", err)

View on GitHub (pinned to d6c691947f)