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fix(tui): rename ActorSelectionOverlay._render to avoid shadowing Textual internal method #2256

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opened 2026-04-03 11:28:29 +00:00 by hamza.khyari · 2 comments

hamza.khyari commented

2026-04-03 11:28:29 +00:00

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Metadata

Commit Message: fix(tui): rename ActorSelectionOverlay._render to avoid shadowing Textual internal method
Branch: fix/tui-actor-overlay-render-crash

Background and Context

Running agents tui crashes immediately with an AttributeError before the UI becomes interactive. The crash originates inside Textual's layout engine during the initial screen reflow. It affects every launch — the TUI is completely unusable.

Current Behavior

Running agents tui produces a traceback ending with:

AttributeError: 'NoneType' object has no attribute 'get_height'

Reproduction steps:

Run agents tui
Observe crash traceback immediately after plugin manager debug log lines

Call chain leading to crash:

Screen._refresh_layout triggers compositor reflow
Compositor arranges children of Vertical(id='main-column')
Textual resolves box models for auto-height widgets
For ActorSelectionOverlay(id='actor-selection'), Textual calls Widget.get_content_height() (textual/widget.py:1651), which calls self._render() expecting a Visual return value
ActorSelectionOverlay._render() (src/cleveragents/tui/widgets/actor_selection_overlay.py:221) shadows the parent method and returns None (no return statement)
Textual attempts visual.get_height(width) on None, raising AttributeError

Expected Behavior

agents tui starts without error. The actor selection overlay renders correctly on first run, and is hidden otherwise.

Acceptance Criteria

ActorSelectionOverlay does not shadow any textual.widgets.Static or textual.widget.Widget internal methods
agents tui launches without traceback
Actor selection overlay still renders correctly when show() is called (first-run path)
Actor selection overlay is hidden when hide() is called (returning-user path)
Navigation (move_up, move_down), search (set_search), and confirmation (confirm) still update the overlay content
All existing tests in features/steps/tui_first_run_steps.py pass

Supporting Information

Root cause file: src/cleveragents/tui/widgets/actor_selection_overlay.py:221-227

def _render(self) -> None:          # shadows Widget._render() which must return Visual
    content = render_actor_selection(
        self._filtered_actors,
        self._selected_index,
        self._search_query,
    )
    self.update(content)

The method name _render collides with Widget._render(), a Textual-internal method that must return a Visual object. The overlay's method is purely a convenience wrapper around self.update() and does not need this name.

Internal call sites that must be updated (all within the same file):

Line 148 (show)
Line 164 (move_up)
Line 171 (move_down)
Line 194 (set_search)

Test file with references: features/steps/tui_first_run_steps.py:252

Subtasks

Rename _render to _refresh_content (or similar) in src/cleveragents/tui/widgets/actor_selection_overlay.py
Update all 4 internal call sites (show, move_up, move_down, set_search)
Verify no other widgets in src/cleveragents/tui/widgets/ shadow _render
Tests (Behave): Confirm existing TUI first-run scenarios pass
Run nox (all default sessions), fix any errors

Definition of Done

This issue is complete when:

All subtasks above are completed and checked off.
A Git commit is created where the first line of the commit message matches the Commit Message in Metadata exactly, followed by a blank line, then additional lines providing relevant details about the implementation.
The commit is pushed to the remote on the branch matching the Branch in Metadata exactly.
The commit is submitted as a pull request to master, reviewed, and merged before this issue is marked done.

## Metadata - **Commit Message**: `fix(tui): rename ActorSelectionOverlay._render to avoid shadowing Textual internal method` - **Branch**: `fix/tui-actor-overlay-render-crash` ## Background and Context Running `agents tui` crashes immediately with an `AttributeError` before the UI becomes interactive. The crash originates inside Textual's layout engine during the initial screen reflow. It affects every launch — the TUI is completely unusable. ## Current Behavior Running `agents tui` produces a traceback ending with: ``` AttributeError: 'NoneType' object has no attribute 'get_height' ``` **Reproduction steps:** 1. Run `agents tui` 2. Observe crash traceback immediately after plugin manager debug log lines **Call chain leading to crash:** 1. `Screen._refresh_layout` triggers compositor reflow 2. Compositor arranges children of `Vertical(id='main-column')` 3. Textual resolves box models for auto-height widgets 4. For `ActorSelectionOverlay(id='actor-selection')`, Textual calls `Widget.get_content_height()` (`textual/widget.py:1651`), which calls `self._render()` expecting a `Visual` return value 5. `ActorSelectionOverlay._render()` (`src/cleveragents/tui/widgets/actor_selection_overlay.py:221`) shadows the parent method and returns `None` (no return statement) 6. Textual attempts `visual.get_height(width)` on `None`, raising `AttributeError` ## Expected Behavior `agents tui` starts without error. The actor selection overlay renders correctly on first run, and is hidden otherwise. ## Acceptance Criteria - `ActorSelectionOverlay` does not shadow any `textual.widgets.Static` or `textual.widget.Widget` internal methods - `agents tui` launches without traceback - Actor selection overlay still renders correctly when `show()` is called (first-run path) - Actor selection overlay is hidden when `hide()` is called (returning-user path) - Navigation (`move_up`, `move_down`), search (`set_search`), and confirmation (`confirm`) still update the overlay content - All existing tests in `features/steps/tui_first_run_steps.py` pass ## Supporting Information **Root cause file:** `src/cleveragents/tui/widgets/actor_selection_overlay.py:221-227` ```python def _render(self) -> None: # shadows Widget._render() which must return Visual content = render_actor_selection( self._filtered_actors, self._selected_index, self._search_query, ) self.update(content) ``` The method name `_render` collides with `Widget._render()`, a Textual-internal method that must return a `Visual` object. The overlay's method is purely a convenience wrapper around `self.update()` and does not need this name. **Internal call sites that must be updated** (all within the same file): - Line 148 (`show`) - Line 164 (`move_up`) - Line 171 (`move_down`) - Line 194 (`set_search`) **Test file with references:** `features/steps/tui_first_run_steps.py:252` ## Subtasks - [ ] Rename `_render` to `_refresh_content` (or similar) in `src/cleveragents/tui/widgets/actor_selection_overlay.py` - [ ] Update all 4 internal call sites (`show`, `move_up`, `move_down`, `set_search`) - [ ] Verify no other widgets in `src/cleveragents/tui/widgets/` shadow `_render` - [ ] Tests (Behave): Confirm existing TUI first-run scenarios pass - [ ] Run `nox` (all default sessions), fix any errors ## Definition of Done This issue is complete when: - All subtasks above are completed and checked off. - A Git commit is created where the **first line** of the commit message matches the Commit Message in Metadata exactly, followed by a blank line, then additional lines providing relevant details about the implementation. - The commit is pushed to the remote on the branch matching the **Branch** in Metadata exactly. - The commit is submitted as a **pull request** to `master`, reviewed, and **merged** before this issue is marked done.

hamza.khyari added the

labels

2026-04-03 11:28:29 +00:00

freemo referenced this issue

2026-04-03 11:44:03 +00:00

[Automated] Product Build Session State — v3.7.0 Production Sprint #2006

hamza.khyari added the

State

Verified

label

2026-04-03 15:10:09 +00:00

freemo commented

2026-04-03 17:21:39 +00:00

Owner

Issue reviewed and acknowledged.

Excellent bug report. The root cause analysis is thorough — ActorSelectionOverlay._render() shadows Widget._render() which must return a Visual object, causing an immediate crash on TUI launch. The proposed fix (rename to _refresh_content) is sound and the 4 internal call sites are clearly identified.

Triage summary:

State: Verified (confirmed — the TUI is completely unusable due to this crash)
Priority: High (confirmed — this is a blocking crash that prevents any TUI usage)
Milestone: Not currently assigned. This is a TUI bug and should be assigned to v3.7.0 (M8: TUI Implementation) since it directly affects the TUI's ability to launch.
Parent Epic: Not linked. This should be linked to the TUI implementation epic. Flagging as needing a parent epic link.

This is a high-priority fix since it renders the entire TUI non-functional. Ready for implementation.

Automated by CleverAgents Bot
Supervisor: Human Liaison | Agent: ca-human-liaison

Issue reviewed and acknowledged. Excellent bug report. The root cause analysis is thorough — `ActorSelectionOverlay._render()` shadows `Widget._render()` which must return a `Visual` object, causing an immediate crash on TUI launch. The proposed fix (rename to `_refresh_content`) is sound and the 4 internal call sites are clearly identified. **Triage summary:** - **State**: Verified (confirmed — the TUI is completely unusable due to this crash) - **Priority**: High (confirmed — this is a blocking crash that prevents any TUI usage) - **Milestone**: Not currently assigned. This is a TUI bug and should be assigned to **v3.7.0** (M8: TUI Implementation) since it directly affects the TUI's ability to launch. - **Parent Epic**: Not linked. This should be linked to the TUI implementation epic. Flagging as needing a parent epic link. This is a high-priority fix since it renders the entire TUI non-functional. Ready for implementation. --- **Automated by CleverAgents Bot** Supervisor: Human Liaison | Agent: ca-human-liaison

HAL9000 commented

2026-04-09 05:56:31 +00:00

Owner

MoSCoW classification: MoSCoW/Should Have

Rationale: This bug involves a method naming conflict in the TUI — ActorSelectionOverlay._render shadows a Textual internal method, which can cause subtle rendering bugs and unpredictable behavior.

Why Should Have (not Must Have):

This is a naming conflict that may not manifest as a visible bug in all cases
The TUI continues to function (the overlay works), just with potential edge-case rendering issues
No milestone is blocked by this issue

Why Should Have (not Could Have):

Priority/High indicates this has real impact — shadowing framework internals is a code quality risk
Textual framework updates could break the overlay behavior unpredictably
The fix is a simple rename (low effort, high safety improvement)
This is the kind of technical debt that compounds over time

Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: project-owner

MoSCoW classification: **MoSCoW/Should Have** Rationale: This bug involves a method naming conflict in the TUI — `ActorSelectionOverlay._render` shadows a Textual internal method, which can cause subtle rendering bugs and unpredictable behavior. **Why Should Have (not Must Have):** - This is a naming conflict that may not manifest as a visible bug in all cases - The TUI continues to function (the overlay works), just with potential edge-case rendering issues - No milestone is blocked by this issue **Why Should Have (not Could Have):** - Priority/High indicates this has real impact — shadowing framework internals is a code quality risk - Textual framework updates could break the overlay behavior unpredictably - The fix is a simple rename (low effort, high safety improvement) - This is the kind of technical debt that compounds over time --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: project-owner

HAL9000 referenced this issue

2026-04-09 06:00:07 +00:00

[AUTO-PROJ-OWN] Project Owner Report (Cycle 26) #5296

HAL9000 was assigned by hamza.khyari

2026-04-28 14:59:37 +00:00