Build failure with mergeDebugJniLibFolders

[clehner]

• Misc build fixes #101
• Flutter (Channel main, 3.1.0-0.0.pre.1066, on Debian GNU/Linux bookworm/sid 5.15.0-3-amd64, locale C.UTF-8)
• Android toolchain - develop for Android devices (Android SDK version 30.0.3)

$ flutter run
"fr": 5 untranslated message(s).
To see a detailed report, use the untranslated-messages-file
option in the l10n.yaml file:
untranslated-messages-file: desiredFileName.txt
<other option>: <other selection>


This will generate a JSON format file containing all messages that
need to be translated.
Launching lib/main.dart on [...] in debug mode...
Warning: The plugin qr_code_scanner requires Android SDK version 32.
For more information about build configuration, see https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
One or more plugins require a higher Android SDK version.
Fix this issue by adding the following to /home/cel/src/credible/android/app/build.gradle:
android {
  compileSdkVersion 32
  ...
}


FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':didkit:mergeDebugJniLibFolders'.
> java.lang.NullPointerException (no error message)

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

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

BUILD FAILED in 1s
Running Gradle task 'assembleDebug'...                           2,110ms
Exception: Gradle task assembleDebug failed with exit code 1

didkit targets are built:

$ ls -lL lib/android/didkit/src/main/jniLibs/*/libdidkit.so
-rwxr-xr-x 1 cel cel 13237776 Jun  2 13:49 lib/android/didkit/src/main/jniLibs/arm64-v8a/libdidkit.so
-rwxr-xr-x 1 cel cel  9391496 Jun  2 13:46 lib/android/didkit/src/main/jniLibs/armeabi-v7a/libdidkit.so
-rwxr-xr-x 1 cel cel 16317080 Jun  2 13:44 lib/android/didkit/src/main/jniLibs/x86/libdidkit.so
-rwxr-xr-x 1 cel cel 15621520 Jun  2 13:51 lib/android/didkit/src/main/jniLibs/x86_64/libdidkit.so

$ ls -lL lib/flutter/android/src/main/jniLibs/*/libdidkit.so
-rwxr-xr-x 1 cel cel 13237776 Jun  2 13:49 lib/flutter/android/src/main/jniLibs/arm64-v8a/libdidkit.so
-rwxr-xr-x 1 cel cel  9391496 Jun  2 13:46 lib/flutter/android/src/main/jniLibs/armeabi-v7a/libdidkit.so
-rwxr-xr-x 1 cel cel 15621520 Jun  2 13:51 lib/flutter/android/src/main/jniLibs/x86_64/libdidkit.so

[clehner]

Error went away after removing the android/.gradle directory and retrying build/run.
https://stackoverflow.com/a/39281447