Target dart2js failed: Exception: .dart_tool/flutter_build/0e658b7c03aeae78aa77acd27f850684/app.dill:

[stvoidmain]

Target dart2js failed: Exception: .dart_tool/flutter_build/0e658b7c03aeae78aa77acd27f850684/app.dill:
Internal Error: The compiler crashed when compiling this element.
The compiler is broken.

When compiling the above element, the compiler crashed. It is not
possible to tell if this is caused by a problem in your program or
not. Regardless, the compiler should not crash.

The compiler crashed: Expected a library reference to be valid but was null.
#0 BinaryBuilder.readNonNullLibraryReference (package:kernel/binary/ast_from_binary.dart:999:5)
#1 BinaryBuilder.readLibraryDependency (package:kernel/binary/ast_from_binary.dart:1189:31)
#2 BinaryBuilder._readLibraryDependencies (package:kernel/binary/ast_from_binary.dart:1181:33)
#3 BinaryBuilder.readLibrary (package:kernel/binary/ast_from_binary.dart:1150:5)
#4 BinaryBuilder._readOneComponent (package:kernel/binary/ast_from_binary.dart:841:9)
#5 BinaryBuilder.readComponent. (package:kernel/binary/ast_from_binary.dart:633:34)
#6 Timeline.timeSync (dart:developer/timeline.dart:163:22)
#7 BinaryBuilder.readComponent (package:kernel/binary/ast_from_binary.dart:603:21)
#8 KernelLoaderTask.load..read (package:compiler/src/kernel/loader.dart:97:41)

#9 KernelLoaderTask.load. (package:compiler/src/kernel/loader.dart:100:9)

#10 Compiler.runInternal (package:compiler/src/compiler.dart:285:29)

Compiling lib\main.dart for the Web... 11,6s
Exception: Failed to compile application for the Web.

• Dart SDK version: 2.13.4 (stable) (Wed Jun 23 13:08:41 2021 +0200) on "windows_x64"
• Windows 10 x64
• It fails on Windows and Linux (Ubuntu xenial) too.

[sigmundch]

I wonder if this is a build system or CFE issue, that managed to manifest at the dart2js compilation step.

@jonahwilliams - are there any issues reported on the flutter_tools side of things similar to this?
@johnniwinther - any reason to expect library dependencies to be null?

[johnniwinther]

There is a discrepancy between ast_to_binary.dart and ast_from_binary.dart. In ast_to_binary.dart it is allowed for a library referenced in a library dependency to have no canonical name, whereas in ast_from_binary.dart the libraries read as part of library dependencies must have a canonical name, and it throws if it doesn't.

The missing canonical name is likely due to a library only being referenced in a library dependency, though I can't think of a good reason why it is allowed to be missing its canonical name, as opposed to just failing in ast_to_binary.dart when the library reference apparently hasn't been prepared for serialization.

I'll try to make a repro.

[stvoidmain]

It was a silly problem, i had an import in a package sub-project that imported a dart file which was also "part of" the same package, so it gave a kind of circular reference but wasn't detected or indicated, a better error would suffice for these cases I believe...
I think doing a repro case will be easy enough.
interesting thing is that it work just fine when doing a flutter run -d edge or chrome but when building it gave the error.

[jensjoha]

Hi @stvoidmain

Thank you for reporting this.
Unfortunately I can't follow the reproduction description (and can't otherwise think of a way to reproduce it). Can you still remember what happened and try to describe it differently or in more detail?

[jensjoha]

Scratch that --- I reproduced the crash.
But am I wright in my understanding, that you never got a compiler error? (In my reproduction I do get a compiler error first...)

[stvoidmain]

No I didn't get a compiler error, only the crash, maybe in that specific versión it didn't raise the compiler error? El lun, 13 sept 2021 a las 9:12, jensjoha ***@***.***>) escribió:

…

Scratch that --- I reproduced the crash. But am I wright in my understanding, that you never got a compiler error? (In my reproduction I do get a compiler error first...) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#46706 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AARB76DABDWX2CQVPPXTIJTUBXTBLANCNFSM5A5PW76Q> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

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[annagrin]

[dart rotation] @jensjoha should this bug be closed as fixed?

[jensjoha]

Sure. Let's assume it's the same bug =)
Please reopen if it happens again.

[sambitraze]

happend again

this error occured while building in vercel platform
my build script:

if cd flutter; then git pull && cd .. ; else git clone https://github.com/flutter/flutter.git -b stable; fi && ls && flutter/bin/flutter doctor && flutter/bin/flutter clean && flutter/bin/flutter config --enable-web