Empty List for TableRow throws unnamed assertion #119541
Description
Steps to Reproduce
- Execute
flutter runon the code sample
Expected results:
A helpful error message, that tells me there are no children in the list.
Actual results:
══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following assertion was thrown building Builder:
'package:flutter/src/rendering/table.dart': Failed assertion: line 632 pos 16: '_rows == 0': is not
true.
Code sample
import 'package:flutter/material.dart';
void main() {
runApp(MaterialApp(
home: Table(children: [
TableRow(children: []),
]),
));
}Logs
[+1661 ms] ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
[ ] The following assertion was thrown building Builder:
[ ] Assertion failed: file:///home/user/.flutter/packages/flutter/lib/src/rendering/table.dart:632:16
[ ] _rows == 0
[ ] is not true
[ ] The relevant error-causing widget was:
[ ] MaterialApp MaterialApp:file:///tmp/test/lib/main.dart:4:8
[ ] When the exception was thrown, this was the stack:
[ ] dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 266:49 throw_
[ ] dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 29:3 assertFailed
[ ] packages/flutter/src/rendering/table.dart 632:25 setFlatChildren
[ ] packages/flutter/src/widgets/table.dart 391:18 [_updateRenderObjectChildren]
[ ] packages/flutter/src/widgets/table.dart 312:5 mount
[ ] packages/flutter/src/widgets/framework.dart 3863:15 inflateWidget
[ ] packages/flutter/src/widgets/framework.dart 3592:18 updateChild
[ ] packages/flutter/src/widgets/framework.dart 6300:14 mount
[ ] packages/flutter/src/widgets/framework.dart 3863:15 inflateWidget
[ ] packages/flutter/src/widgets/framework.dart 3592:18 updateChild
[ ] packages/flutter/src/widgets/framework.dart 4904:16 performRebuild
...
~1000 Lines of identical StackTrace
...
[ ] packages/flutter/src/widgets/framework.dart 4604:5 rebuild
[ ] packages/flutter/src/widgets/framework.dart 4859:5 [_firstBuild]
[ ] packages/flutter/src/widgets/framework.dart 5041:11 [_firstBuild]
[ ] packages/flutter/src/widgets/framework.dart 4853:5 mount
[ ] packages/flutter/src/widgets/framework.dart 3863:15 inflateWidget
[ ] packages/flutter/src/widgets/framework.dart 3592:18 updateChild
[ ] packages/flutter/src/widgets/binding.dart 1195:16 [_rebuild]
[ ] packages/flutter/src/widgets/binding.dart 1164:5 mount
[ ] packages/flutter/src/widgets/binding.dart 1111:16 <fn>
[ ] packages/flutter/src/widgets/framework.dart 2605:19 buildScope
[ ] packages/flutter/src/widgets/binding.dart 1110:12 attachToRenderTree
[ ] packages/flutter/src/widgets/binding.dart 944:24 attachRootWidget
[ ] packages/flutter/src/widgets/binding.dart 925:7 <fn>
[ ] dart-sdk/lib/_internal/js_dev_runtime/private/isolate_helper.dart 48:19 internalCallback
[ ] ════════════════════════════════════════════════════════════════════════════════════════════════════
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