flutterflow ai run fails on any project with an Icon-type component param — "Unsupported existing project data type: WidgetProperty"

[405carrental]

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• I give permission for members of the FlutterFlow team to access and test my project for the sole purpose of investigating this issue.

Current Behavior

flutterflow ai run fails on every push attempt with:

Error: Unsupported operation: Unsupported existing project data type: WidgetProperty

Thrown from compiler.dart:1730 (and identically :1954), in the switch that maps an existing project's stored FFBaseDataType to the compiler's DslType. WidgetProperty isn't a handled case, so it falls through to default: throw. This fires while the compiler reflects the existing project state, so it blocks any push regardless of what the edit script actually changes.

Root cause — confirmed by direct A/B test: the project has component params of FlutterFlow's Icon type (Button.icon, Button.iconEnd, TextField.leadingIcon, TextField.trailingIcon, NavItem.icon), which serialize as data type WidgetProperty. Removing all Icon-type params from every component made the error disappear on the next flutterflow ai run. Restoring them reproduced the exact original error.

Side effect discovered during testing: removing an Icon-type param does not clean up internal widget bindings that referenced it — the component's internal Icon widget stays bound to the deleted param, surfacing "Icon variable is not valid" errors 1:1 with removed params.

Environment: FlutterFlow AI SDK 0.0.40 (build 2c299209, confirmed latest), Dart 3.12.2, Windows 10, Project ID fuzzy-task-aebj4c.

Related: flutterflow ai codegen refresh on the same project fails identically with HTTP 400 "Error generating code for the project" — likely the same underlying gap.

Expected Behavior

flutterflow ai run should successfully push to any existing project accessible via the API key, including ones with Icon-type component parameters — a completely standard param type for buttons and text fields.

Steps to Reproduce

1. Bind a workspace to a project containing at least one component param of type Icon (e.g. a Button component with an "icon" param).
2. Run any edit push: flutterflow ai run dsl/edit.dart --project-id --commit-message "test" — even a no-op edit fails identically.
3. Observe [FAIL] compileDslApp with the WidgetProperty error above.
4. To verify: remove every Icon-type param from every component in the FlutterFlow editor, retry — the WidgetProperty error disappears. Restore the params — the original error returns exactly.

Reproducible from Blank

• The steps to reproduce above start from a blank project.

Bug Report Code (Required)

IT4gks/q+clJpbwA7aX2a+9VijwsHGV/UK00t9obbxAjIoDoPJkUac6kSEpWZ9+kTHxfMVu0iWoW0aH9iIbTLPk4YQSVR7pnyIdcQxXzXk+WMrrUFJWgYXAlI99hIWa40rungBJTLrJqdFIM3Tn7NtiuYATtJJDtC0dFDq/LZO4=

Visual documentation

Windows PowerShell
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PS C:\Users\auduser> cd C:\Users\auduser\FuzzyTask\fuzzytask

flutterflow ai run dsl/edit.dart --project-id fuzzy-task-aebj4c --commit-message "test"
Workspace binding: fuzzy-task-aebj4c.
Resolved target mode: existing (existing project fuzzy-task-aebj4c).
[FAIL] compileDslApp (323ms)
Error: Unsupported operation: Unsupported existing project data type: WidgetProperty

Recovery hints from previous failed run:
• Task "compileDslApp" failed: Unsupported operation: Unsupported existing project data type: WidgetProperty. Fix the error and re-run.

Error: Unsupported operation: Unsupported existing project data type: WidgetProperty
PS C:\Users\auduser\FuzzyTask\fuzzytask>

Environment

- FlutterFlow version: SDK 0.0.40 (build 2c299209)
- Platform: Windows Desktop / CLI
- Browser name and version: N/A (CLI-based, not browser)
- Operating system and version affected: Windows 10

Additional Information

No response