dart2js crashes when MirrorsUsed annotations contains symbols.

My current take:
The validate method in MirrorUsageAnalyzerTask uses the ConstantMapper visitor which evaluates the constant. However at that time the Symbol constructor hasn't been completely resolved yet.

Example:
@MirrorsUsed(symbols: #foo)
import 'dart:mirrors';

main() {
}

Backtrace:
NoSuchMethodError : method not found: 'getType'
Receiver: null
Arguments: [Instance of 'Send']

­0 Object.noSuchMethod (dart:core-patch/object_patch.dart:45)

­1 ResolverTask.resolveRedirectionChain (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart:669:31)

­2 CompileTimeConstantEvaluator.makeConstructedConstant (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compile_time_constants.dart:720:46)

­3 CompileTimeConstantEvaluator.visitLiteralSymbol (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compile_time_constants.dart:404:35)

­4 LiteralSymbol.accept (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/tree/nodes.dart:976:56)

­5 CompileTimeConstantEvaluator.evaluate (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compile_time_constants.dart:252:23)

­6 ConstantMapper.visitNode (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart:1250:43)

­7 Visitor.visitExpression (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/tree/nodes.dart:25:50)

­8 Visitor.visitLiteralSymbol (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/tree/nodes.dart:80:62)

­9 LiteralSymbol.accept (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/tree/nodes.dart:976:56)

­10 MirrorUsageAnalyzerTask.validate (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/mirrors_used.dart:141:30)

­11 ResolverVisitor.visitNewExpression (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart:3101:48)

­12 NewExpression.accept (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/tree/nodes.dart:494:56)

­13 ResolverTask.resolveMetadataAnnotation.<anonymous closure>.<anonymous closure> (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart:1223:18)

­14 CompilerTask.measure (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:1623:37)

­15 ResolverTask.resolveMetadataAnnotation.<anonymous closure> (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart:1212:75)

­16 Compiler.withCurrentElement (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:499:15)

­17 Compiler.withCurrentElement (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:520:7)

­18 Compiler.withCurrentElement (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:500:7)

­19 ResolverTask.resolveMetadataAnnotation (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart:1212:32)

­20 MetadataAnnotationX.ensureResolved (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/elements/modelx.dart:2502:50)

­21 MirrorUsageAnalyzer.mirrorsUsedOnLibraryTag (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/mirrors_used.dart:269:30)

­22 MirrorUsageAnalyzer.collectMirrorsUsedAnnotation.<anonymous closure> (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/mirrors_used.dart:211:38)

­23 Compiler.withCurrentElement (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:499:15)

­24 Compiler.withCurrentElement (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:514:23)

­25 Compiler.withCurrentElement (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:500:7)

­26 MirrorUsageAnalyzer.collectMirrorsUsedAnnotation (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/mirrors_used.dart:209:36)

­27 run (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/mirrors_used.dart:186:37)

­28 CompilerTask.measure (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:1623:37)

­29 MirrorUsageAnalyzerTask.analyzeUsage (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/mirrors_used.dart:107:12)

­30 Compiler.compileLoadedLibraries (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:1059:43)

­31 Compiler.runCompiler.<anonymous closure> (file:///mnt/ssd/floitsch/code/dart/dart/sdk/lib/_internal/compiler/implementation/compiler.dart:1008:29)

­32 _rootRunUnary (dart:async/zone.dart:717)

­33 _RootZone.runUnary (dart:async/zone.dart:854)

­34 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:439)

­35 _Future._propagateToListeners (dart:async/future_impl.dart:522)

­36 _Future._complete (dart:async/future_impl.dart:303)

­37 Future.forEach.nextElement (dart:async/future.dart:286)

­38 _rootRunUnary (dart:async/zone.dart:717)

­39 _RootZone.runUnary (dart:async/zone.dart:854)

­40 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:439)

­41 _Future._propagateToListeners (dart:async/future_impl.dart:522)

­42 _Future._complete (dart:async/future_impl.dart:303)

­43 _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:354)

­44 _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:23)

­45 _asyncRunCallback (dart:async/schedule_microtask.dart:32)

­46 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:119)