Leading widget consumes entire tile width. Please use a sized widget, or consider replacing ListTile with a custom widget (see https://api.flutter.dev/flutter/material/ListTile-class.html#material.ListTile.4)
'package:flutter/src/material/list_tile.dart':
package:flutter/…/material/list_tile.dart:1
Failed assertion: line 1204 pos 7: 'tileWidth != leadingSize.width || tileWidth == 0.0'