error after Code Obfuscating under release mode

[hpp0hpp]

Hi, I am using shelf_plus to respond a text. but if no obfuscating, it runs ok. after I obfuscating the code,

with flutter build apk --obfuscate --split-debug-info=/doubantv/debug-info
will reports an error:

Error thrown by handler.
NoSuchMethodError: Closure call with mismatched arguments: function 'Oxb'
Receiver: Closure: (dva) => Future
Tried calling: Oxb
Found: Oxb(dva) => Future

because it's release mode. I don;t know how to debug the problem, but it seems the error caused here

[natebosch]

@mraleph - can you suggest any way to get more information about the failure?

@hpp0hpp - do you have a stack trace? Does it point to anywhere helpful?

[mraleph]

It would help to see the stack trace. The error just indicates a mismatched closure call of some sort. I would not be surprised that maybe something like Type.toString() is used somewhere and things go south.

[hpp0hpp]

@mraleph - can you suggest any way to get more information about the failure?

@hpp0hpp - do you have a stack trace? Does it point to anywhere helpful?

It would help to see the stack trace. The error just indicates a mismatched closure call of some sort. I would not be surprised that maybe something like Type.toString() is used somewhere and things go south.

HI @natebosch @mraleph

Hi I would like to share more information, but the obfuscate only allow under release mode, I don't know how to produce a stack trace for that. this error is reported in logcat.

[mraleph]

Do you get any stack trace printed?

You could just patch shelf code to do print('$stackTrace'); before _logError.

After that you can deobfuscate it using the debug information you split out. See

https://docs.flutter.dev/deployment/obfuscate#reading-an-obfuscated-stack-trace