Is dart:intl broken? / DateFormat to complicated - dart

Question

I using Dart Editor 0.3.7_r18717 (means the editor is up to date (Feb 2013)
import 'dart:intl';
Shows an error "Cannot find referenced source"
If I import the package via pub
import 'package:intl/intl.dart';
then compiling to JS dart2js fails with some weird errors...
What I want is simply something like this:
final String time = new DateFormat("HH:mm:ss","de").format(new DateTime.now());
It's not clear at all why the locale is needed in such case...
thx
[Update]
OK - I know "weird errors" means nothing - so here is the output if I import the following two packages:
import 'package:intl/date_symbol_data_local.dart';
import 'package:intl/intl.dart';
String getTime() {
final String time = new DateFormat("HH:mm:ss","en_US").format(new DateTime.now());
//final String time = "20:05:00";
return time;
}
Output:
Running dart2js...
Using snapshot /Developer/dart/dart-sdk/lib/_internal/compiler/implementation/dart2js.dart.snapshot
Wrote /Users/mikemitterer/dart/WebSockets.SAMPLE/web/out/jrelaisui.html_bootstrap.dart.js [410.0kb written in 5.3 seconds]
build.dart --machine --changed=web/jrelaisui.dart
file:/Users/mikemitterer/dart/WebSockets.SAMPLE/build.dart
build.dart returned error code 255
Uncaught Error: NoSuchMethodError : method not found: '_addFromInteger#0x36924d72'
Receiver: null
Arguments: [80]
Stack Trace:
#0 Object.noSuchMethod (dart:core-patch:1737:25)
#1 int.+ (dart:core-patch:1324:33)
#2 Parser.translateCharacter (package:analyzer_experimental/src/generated/parser.dart:4380:167)
#3 Parser.computeStringValue (package:analyzer_experimental/src/generated/parser.dart:376:33)
#4 Parser.parseStringLiteral (package:analyzer_experimental/src/generated/parser.dart:3451:76)
#5 Parser.parsePrimaryExpression (package:analyzer_experimental/src/generated/parser.dart:3163:32)
#6 Parser.parseAssignableExpression (package:analyzer_experimental/src/generated/parser.dart:837:51)
#7 Parser.parsePostfixExpression (package:analyzer_experimental/src/generated/parser.dart:3061:51)
...
Output - Clean Up Source:
build.dart --machine --clean
file:/Users/mikemitterer/dart/HelloWebComponent/build.dart
build.dart returned error code 255
'package:html5lib/src/encoding_parser.dart': Error: line 65 pos 14: class 'EncodingBytes' overrides function 'skip' of super class 'Iterable' with incompatible parameters
String skip([CharPreciate skipChars]) {
^
build.dart --machine --clean
file:/Users/mikemitterer/dart/todomvc/build.dart
build.dart returned error code 255
'package:html5lib/src/encoding_parser.dart': Error: line 65 pos 14: class 'EncodingBytes' overrides function 'skip' of super class 'Iterable' with incompatible parameters
String skip([CharPreciate skipChars]) {
...
Thats what I mean with "weird" :-)

Answer 1

The package syntax is the correct one, this should work:
import 'package:intl/date_symbol_data_local.dart';
import 'package:intl/intl.dart';
main() {
print(new DateFormat.yMd().format(new DateTime.now()));
}
What "weird errors" are you talking about?

Answer 2

import "dart:intl"; won't work to import it because it's not one of the "core" dart libraries, it has to be imported as a package. The errors you're listing in dart2js don't look like they're coming from internationalization code, but from web_ui and from the analyzer_experimental package. What happens if you comment out the lines that use internationalization and compile using dart2js?