[web] SkwasmPaint fails to compile its toString() method #141639
Description
Compiling a toString() method implementation for the SkwasmPaint class produces output that fails to start when running an engine test in Skwasm mode.
To reproduce add the following toString() implementation to SkwasmPaint (the exact same implementation in CkPaint works as expected):
// Must be kept in sync with the default in paint.cc.
static const double _kStrokeMiterLimitDefault = 4.0;
// Must be kept in sync with the default in paint.cc.
static const int _kColorDefault = 0xFF000000;
// Must be kept in sync with the default in paint.cc.
static final int _kBlendModeDefault = ui.BlendMode.srcOver.index;
@override
String toString() {
String resultString = 'Paint()';
assert(() {
final StringBuffer result = StringBuffer();
String semicolon = '';
result.write('Paint(');
if (style == ui.PaintingStyle.stroke) {
result.write('$style');
if (strokeWidth != 0.0) {
result.write(' ${strokeWidth.toStringAsFixed(1)}');
} else {
result.write(' hairline');
}
if (strokeCap != ui.StrokeCap.butt) {
result.write(' $strokeCap');
}
if (strokeJoin == ui.StrokeJoin.miter) {
if (strokeMiterLimit != _kStrokeMiterLimitDefault) {
result.write(' $strokeJoin up to ${strokeMiterLimit.toStringAsFixed(1)}');
}
} else {
result.write(' $strokeJoin');
}
semicolon = '; ';
}
if (!isAntiAlias) {
result.write('${semicolon}antialias off');
semicolon = '; ';
}
if (color != const ui.Color(_kColorDefault)) {
result.write('$semicolon$color');
semicolon = '; ';
}
if (blendMode.index != _kBlendModeDefault) {
result.write('$semicolon$blendMode');
semicolon = '; ';
}
if (colorFilter != null) {
result.write('${semicolon}colorFilter: $colorFilter');
semicolon = '; ';
}
if (maskFilter != null) {
result.write('${semicolon}maskFilter: $maskFilter');
semicolon = '; ';
}
if (filterQuality != ui.FilterQuality.none) {
result.write('${semicolon}filterQuality: $filterQuality');
semicolon = '; ';
}
if (shader != null) {
result.write('${semicolon}shader: $shader');
semicolon = '; ';
}
if (imageFilter != null) {
result.write('${semicolon}imageFilter: $imageFilter');
semicolon = '; ';
}
if (invertColors) {
result.write('${semicolon}invert: $invertColors');
}
result.write(')');
resultString = result.toString();
return true;
}());
return resultString;
}Then run the text_style_test.dart as follows:
dev/felt test --browser=chrome --renderer=skwasm --compiler=dart2wasm test/ui/text_style_test.dart
Expected behavior
The test runs and succeeds or fails.
Actual behavior
The test gets stuck after printing the following:
Running `dart pub get` in 'engine/src/flutter/lib/web_ui'
Copying Skwasm...
Compiling test bundle dart2wasm-skwasm-ui...
Completed compilation of dart2wasm-skwasm-ui in 3046ms.
[chrome-dart2wasm-skwasm-ui] Running...
00:00 +0: loading text_style_test.dart
[CHROME STDERR]:
[CHROME STDERR]:DevTools listening on ws://127.0.0.1:12345/devtools/browser/98972871-cdcd-4a81-84f2-c563f0aeeb2d
The felt process never exits after printing this line. I'm suspecting the wasm module is failing to bootstrap, but I didn't have time to investigate.