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[flutter_svg] FormatException: Invalid double when x or y values contain a List<double> #165490
Description
Steps to reproduce
- Create an SVG with a
List<double>for thexoryvalue in, for example, the<text>field - Open the SVG in any program that renders SVGs (e.g., macOS Preview.app) to verify the SVG displays correctly
- Validate the SVG against
vector_graphics_compiler
Expected results
The SVG should be validated correctly.
Actual results
SVGs containing a List<double> for x or y properties fail to validate.
Code sample
Code sample
SVG:
<?xml version="1.0" encoding="utf-8" ?>
<svg
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
width="1024"
height="1024"
>
<text
transform="translate(415.282 362.619)"
font-size="9.0427618"
font-family="Arial"
x="0 4.8639984 10.014633 14.741928 19.654434 22.608994 24.805069 29.955704 34.943176 37.18335 42.333984 45.473755 47.713928 52.785187 57.697693"
y="8"
>
Hello world
</text>
</svg>Working "fix":
svgImageString
..replaceAllMapped(
RegExp(r'(<text[^>]*\bx=")(\d+(?:\.\d+)?)[^"]*"'),
(Match m) => '${m[1]}${m[2]}"',
)
..replaceAllMapped(
RegExp(r'(<text[^>]*\by=")(\d+(?:\.\d+)?)[^"]*"'),
(Match m) => '${m[1]}${m[2]}"',
);Screenshots or Video
No response
Logs
Logs
dart run vector_graphics_compiler -i test.svg -o temp.svg --no-optimize-masks --no-optimize-clips --no-optimize-overdraw --no-tessellate
Resolving dependencies in `./`...
Downloading packages...
Got dependencies in `./`.
Building package executable...
Built vector_graphics_compiler:vector_graphics_compiler.
XXXXXXXXXXX test.svg XXXXXXXXXXXXX
FormatException: Invalid double
0, 4.8639984, 10.014633, 14.741928, 19.654434, 22.608994, 24.805069, 29.955...
#0 double.parse (dart:core-patch/double_patch.dart:112:7)
#1 parseDouble (package:vector_graphics_compiler/src/svg/numbers.dart:32:17)
#2 DoubleOrPercentage.fromString (package:vector_graphics_compiler/src/svg/parser.dart:2160:33)
#3 SvgParser._createSvgAttributes (package:vector_graphics_compiler/src/svg/parser.dart:1673:31)
#4 SvgParser._readSubtree (package:vector_graphics_compiler/src/svg/parser.dart:693:30)
#5 _SyncStarIterator.moveNext (dart:async-patch/async_patch.dart:595:13)
#6 SvgParser._parseTree (package:vector_graphics_compiler/src/svg/parser.dart:770:34)
#7 SvgParser.parse (package:vector_graphics_compiler/src/svg/parser.dart:805:5)
#8 parse (package:vector_graphics_compiler/vector_graphics_compiler.dart:76:17)
#9 encodeSvg (package:vector_graphics_compiler/vector_graphics_compiler.dart:143:5)
#10 IsolateProcessor._process.<anonymous closure> (file:///Users/hans/.puro/shared/pub_cache/hosted/pub.dev/vector_graphics_compiler-1.1.16/bin/util/isolate_processor.dart:111:33)
#11 _RemoteRunner._run (dart:isolate:1118:47)
#12 _RemoteRunner._remoteExecute (dart:isolate:1112:12)
#13 _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:318:17)
#14 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:194:12)
Some targets failed.Flutter Doctor output
Doctor output
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.29.2, on macOS 15.3.2 24D81 darwin-arm64, locale en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0-rc3)
[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.3)
[✓] VS Code (version 1.98.2)
[✓] Connected device (4 available)
[✓] Network resources
• No issues found!
Activity
maheshj01 commentedon Mar 20, 2025
Reproducible using latest version of
vector_graphics_compiler: ^1.1.16logs
flutter doctor -v
master
stable
mackings commentedon Oct 16, 2026
I'd like to fix this. The compiler parses
x/yas a single number, so a list throws. I'll use the first value in the list, since per-character positioning isn't supported.[vector_graphics_compiler] Handle coordinate lists on text and tspan (#…
github-actions commentedon Nov 10, 2026
This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of
flutter doctor -vand a minimal reproduction of the issue.