Unhandled Exception: Bad state: failed precondition

[prakashssp077]

[ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: Bad state: failed precondition
E/flutter ( 776): #0 checkState (package:quiver/check.dart:73:5)
E/flutter ( 776): #1 Tensor.setTo (package:tflite_flutter/src/tensor.dart:150:5)
E/flutter ( 776): #2 Interpreter.runForMultipleInputs (package:tflite_flutter/src/interpreter.dart:194:33)
E/flutter ( 776): #3 Interpreter.run (package:tflite_flutter/src/interpreter.dart:165:5)
E/flutter ( 776): #4 Classifier.predict (package:fluttertfliteapp/Classifier.dart:137:17)
E/flutter ( 776): #5 _MyHomePageState._predict (package:fluttertfliteapp/main.dart:86:28)
E/flutter ( 776): #6 _MyHomePageState.getImage. (package:fluttertfliteapp/main.dart:79:7)
E/flutter ( 776): #7 State.setState (package:flutter/src/widgets/framework.dart:1267:30)
E/flutter ( 776): #8 _MyHomePageState.getImage (package:fluttertfliteapp/main.dart:73:5)
E/flutter ( 776):
E/flutter ( 776):
D/EGL_emulation( 776): eglMakeCurrent: 0xec5697e0: ver 2 0 (tinfo 0xd3994710)
D/EGL_emulation( 776): eglMakeCurrent: 0xec569060: ver 2 0 (tinfo 0xec474b90)

[am15h]

Hi @prakashssp077, Can you please share some reproducible code.

[yaizudamashii]

I had this when I tried to run PoseNet on an image, the precondition fails where inputTensor bytelength is 4x the input byte's length.

[yaizudamashii]

It seems that when loading the model from asset, _tensor in interpreter.dart already has 4x the number of bytes and trying to resizeInputTensor fails

[yaizudamashii]

@am15h Actually I am getting a similar error, even without doing anything.

I/tflite  ( 5512): Initialized TensorFlow Lite runtime.
I/flutter ( 5512): Interpreter Created Successfully
I/flutter ( 5512): Labels loaded successfully
I/flutter ( 5512): Time to load image: 51 ms
E/tflite  ( 5512): tensorflow/lite/kernels/reshape.cc:66 num_input_elements != num_output_elements (4004 != 1001)
E/tflite  ( 5512): Node number 29 (RESHAPE) failed to prepare.
E/flutter ( 5512): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Bad state: failed precondition
E/flutter ( 5512): #0      checkState (package:quiver/check.dart:74:5)
E/flutter ( 5512): #1      Interpreter.allocateTensors (package:tflite_flutter/src/interpreter.dart:142:5)
E/flutter ( 5512): #2      Interpreter.runForMultipleInputs (package:tflite_flutter/src/interpreter.dart:181:7)
E/flutter ( 5512): #3      Interpreter.run (package:tflite_flutter/src/interpreter.dart:157:5)
E/flutter ( 5512): #4      Classifier.predict (package:imageclassification/classifier.dart:97:17)
E/flutter ( 5512): #5      _MyHomePageState._predict (package:imageclassification/main.dart:67:28)
E/flutter ( 5512): #6      _MyHomePageState.getImage.<anonymous closure> (package:imageclassification/main.dart:61:7)
E/flutter ( 5512): #7      State.setState (package:flutter/src/widgets/framework.dart:1088:30)
E/flutter ( 5512): #8      _MyHomePageState.getImage (package:imageclassification/main.dart:57:5)
E/flutter ( 5512): <asynchronous suspension>
E/flutter ( 5512): 

Steps to reproduce:

1. clone the repository
2. run sh install.sh from example/image_classification
3. build example/image_classification on Android emulator
4. load any image from the emulator by tapping the bottom right button

[yaizudamashii]

Ok false alarm, I had changed the package code and had to repair it using
flutter pub cache repair