Crash when compiling file:///C:/flutter/FlutterRedux_FriendlyChatApp/lib/main.dart, at character offset 1943:

[acrozes]

When I try to run the app, there is a compile error :

Launching lib\main.dart on GT I9505 in debug mode...
Initializing gradle...
Resolving dependencies...
Running 'gradlew assembleDebug'...
compiler message: Unhandled exception:
Crash when compiling file:///C:/flutter/FlutterRedux_FriendlyChatApp/lib/main.dart,
at character offset 1943:
lib/main.dart: Internal problem: Unhandled this in defaultTreeNode.
#0      internalProblem (package:front_end/src/fasta/problems.dart:30)
#1      unhandled (package:front_end/src/fasta/problems.dart:43)
#2      ConstnessEvaluator.defaultTreeNode (package:front_end/src/fasta/kernel/constness_evaluator.dart:112)
#3      TreeVisitor.defaultExpression (package:kernel/visitor.dart:140)
#4      TreeVisitor.visitThisExpression (package:kernel/visitor.dart:171)
#5      ThisExpression.accept (package:kernel/ast.dart:3341)
#6      ConstnessEvaluator.visitPropertyGet (package:front_end/src/fasta/kernel/constness_evaluator.dart:287)
#7      PropertyGet.accept (package:kernel/ast.dart:2242)
#8      ConstnessEvaluator.visitConstructorInvocation (package:front_end/src/fasta/kernel/constness_evaluator.dart:175)
#9      ConstructorInvocation.accept (package:kernel/ast.dart:2983)
#10     ConstnessEvaluator.evaluate (package:front_end/src/fasta/kernel/constness_evaluator.dart:99)
#11     evaluateConstness (package:front_end/src/fasta/kernel/constness_evaluator.dart:466)
#12     BodyBuilder.inferConstness (package:front_end/src/fasta/kernel/body_builder.dart:710)
#13     BodyBuilder.finishFunction (package:front_end/src/fasta/kernel/body_builder.dart:697)
#14     DietListener.listenerFinishFunction (package:front_end/src/fasta/source/diet_listener.dart:684)
#15     DietListener.parseFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:718)
#16     DietListener.buildFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:565)
#17     DietListener.endMethod (package:front_end/src/fasta/source/diet_listener.dart:530)
#18     Parser.parseMethod (package:front_end/src/fasta/parser/parser.dart:3796)
#19     Parser.parseClassMemberImpl (package:front_end/src/fasta/parser/parser.dart:3670)
#20     Parser.parseClassBody (package:front_end/src/fasta/parser/parser.dart:3467)
#21     Parser.parseClass (package:front_end/src/fasta/parser/parser.dart:1699)
#22     Parser.parseClassOrNamedMixinApplication (package:front_end/src/fasta/parser/parser.dart:1659)
#23     Parser.parseTopLevelKeywordDeclaration (package:front_end/src/fasta/parser/parser.dart:535)
#24     Parser.parseTopLevelDeclarationImpl (package:front_end/src/fasta/parser/parser.dart:451)
#25     Parser.parseUnit (package:front_end/src/fasta/parser/parser.dart:335)
#26     SourceLoader.buildBody (package:front_end/src/fasta/source/source_loader.dart:198)
<asynchronous suspension>
#27     Loader.buildBodies (package:front_end/src/fasta/loader.dart:157)
<asynchronous suspension>
#28     KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:292)
<asynchronous suspension>
#29     IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:140)
<asynchronous suspension>
#30     CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:105)
#31     _rootRun (dart:async/zone.dart:1126)
#32     _CustomZone.run (dart:async/zone.dart:1023)
#33     runZoned (dart:async/zone.dart:1501)
#34     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:105)
#35     IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:61)
<asynchronous suspension>
#36     IncrementalCompiler.compile (package:vm/incremental_compiler.dart:33)
<asynchronous suspension>
#37     FrontendCompiler.compile.<anonymous closure> (package:vm/frontend_server.dart:254)
#38     new Future.<anonymous closure> (dart:async/future.dart:174)
#39     _rootRun (dart:async/zone.dart:1122)
#40     _CustomZone.run (dart:async/zone.dart:1023)
#41     _CustomZone.runGuarded (dart:async/zone.dart:925)
#42     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965)
#43     _rootRun (dart:async/zone.dart:1126)
#44     _CustomZone.run (dart:async/zone.dart:1023)
#45     _CustomZone.bindCallback.<anonymo
compiler message: us closure> (dart:async/zone.dart:949)
#46     Timer._createTimer.<anonymous closure> (dart:async-patch/dart:async/timer_patch.dart:21)
#47     _Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:382)
#48     _Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:416)
#49     _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)


#0      internalProblem (package:front_end/src/fasta/problems.dart:30)
#1      unhandled (package:front_end/src/fasta/problems.dart:43)
#2      ConstnessEvaluator.defaultTreeNode (package:front_end/src/fasta/kernel/constness_evaluator.dart:112)
#3      TreeVisitor.defaultExpression (package:kernel/visitor.dart:140)
#4      TreeVisitor.visitThisExpression (package:kernel/visitor.dart:171)
#5      ThisExpression.accept (package:kernel/ast.dart:3341)
#6      ConstnessEvaluator.visitPropertyGet (package:front_end/src/fasta/kernel/constness_evaluator.dart:287)
#7      PropertyGet.accept (package:kernel/ast.dart:2242)
#8      ConstnessEvaluator.visitConstructorInvocation (package:front_end/src/fasta/kernel/constness_evaluator.dart:175)
#9      ConstructorInvocation.accept (package:kernel/ast.dart:2983)
#10     ConstnessEvaluator.evaluate (package:front_end/src/fasta/kernel/constness_evaluator.dart:99)
#11     evaluateConstness (package:front_end/src/fasta/kernel/constness_evaluator.dart:466)
#12     BodyBuilder.inferConstness (package:front_end/src/fasta/kernel/body_builder.dart:710)
#13     BodyBuilder.finishFunction (package:front_end/src/fasta/kernel/body_builder.dart:697)
#14     DietListener.listenerFinishFunction (package:front_end/src/fasta/source/diet_listener.dart:684)
#15     DietListener.parseFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:718)
#16     DietListener.buildFunctionBody (package:front_end/src/fasta/source/diet_listener.dart:565)
#17     DietListener.endMethod (package:front_end/src/fasta/source/diet_listener.dart:530)
#18     Parser.parseMethod (package:front_end/src/fasta/parser/parser.dart:3796)
#19     Parser.parseClassMemberImpl (package:front_end/src/fasta/parser/parser.dart:3670)
#20     Parser.parseClassBody (package:front_end/src/fasta/parser/parser.dart:3467)
#21     Parser.parseClass (package:front_end/src/fasta/parser/parser.dart:1699)
#22     Parser.parseClassOrNamedMixinApplication (package:front_end/src/fasta/parser/parser.dart:1659)
#23     Parser.parseTopLevelKeywordDeclaration (package:front_end/src/fasta/parser/parser.dart:535)
#24     Parser.parseTopLevelDeclarationImpl (package:front_end/src/fasta/parser/parser.dart:451)
#25     Parser.parseUnit (package:front_end/src/fasta/parser/parser.dart:335)
#26     SourceLoader.buildBody (package:front_end/src/fasta/source/source_loader.dart:198)
<asynchronous suspension>
#27     Loader.buildBodies (package:front_end/src/fasta/loader.dart:157)
<asynchronous suspension>
#28     KernelTarget.buildComponent (package:front_end/src/fasta/kernel/kernel_target.dart:292)
<asynchronous suspension>
#29     IncrementalCompiler.computeDelta.<anonymous closure> (package:front_end/src/fasta/incremental_compiler.dart:140)
<asynchronous suspension>
#30     CompilerContext.runInContext.<anonymous closure> (package:front_end/src/fasta/compiler_context.dart:105)
#31     _rootRun (dart:async/zone.dart:1126)
#32     _CustomZone.run (dart:async/zone.dart:1023)
#33     runZoned (dart:async/zone.dart:1501)
#34     CompilerContext.runInContext (package:front_end/src/fasta/compiler_context.dart:105)
#35     IncrementalCompiler.computeDelta (package:front_end/src/fasta/incremental_compiler.dart:61)
<asynchronous suspension>
#36     IncrementalCompiler.compile (package:vm/incremental_compiler.dart:33)
<asynchronous suspension>
#37     FrontendCompiler.compile.<anonymous closure> (package:vm/frontend_server.dart:254)
#38     new Future.<anonymous closure> (dart:async/future.dart:174)
#39     _rootRun (dart:async/zone.dart:1122)
#40     _CustomZone.run (dart:async/zone.dart:1023)
#41     _CustomZone.runGuarded (dart:async/zone.dart:925)
#42     _CustomZone.bi
compiler message: ndCallbackGuarded.<anonymous closure> (dart:async/zone.dart:965)
#43     _rootRun (dart:async/zone.dart:1126)
#44     _CustomZone.run (dart:async/zone.dart:1023)
#45     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:949)
#46     Timer._createTimer.<anonymous closure> (dart:async-patch/dart:async/timer_patch.dart:21)
#47     _Timer._runTimers (dart:isolate-patch/dart:isolate/timer_impl.dart:382)
#48     _Timer._handleMessage (dart:isolate-patch/dart:isolate/timer_impl.dart:416)
#49     _RawReceivePortImpl._handleMessage (dart:isolate-patch/dart:isolate/isolate_patch.dart:165)

Compiler terminated unexpectedly on C:\flutter\FlutterRedux_FriendlyChatApp\lib\main.dart

FAILURE: Build failed with an exception.

* Where:
Script 'C:\flutter\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 441

* What went wrong:
Execution failed for task ':app:flutterDependenciesDebug'.
> Process 'command 'C:\flutter\flutter\bin\flutter.bat'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

BUILD FAILED in 23s
Finished with error: Gradle build failed: 1

Flutter Dorctor:

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel beta, v0.2.8, on Microsoft Windows [version 6.3.9600], locale fr-FR)
[√] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[√] Android Studio (version 3.1)
[√] IntelliJ IDEA Community Edition (version 2018.1)
[√] Connected devices (1 available)

• No issues found!