How to debug what's wrong if app crashes only in release mode

Question

I upgraded Flutter to 2.0.0 recently and am stuck with this issue. flutter run and flutter run --profile work perfectly well, but flutter run --release makes app crash after startup. There is no stacktrace, there is no error or warning, there is no build issue or verbose warning, no hint really. I googled a lot, but similar questions were answered like "try to remove this line" or "try to add that line". I couldn't find any clear steps on how to debug what's wrong.

What steps should I take to debug this issue and find the root cause instead of trying meaningless changes on code hoping some of them will eventually fix the issue?

Answer 1

Use adb logcat

OR

Enable debugging in release build, by modifying your android/app/build.gradle like this

buildTypes {
    release {
        debuggable true
        shrinkResources false
        minifyEnabled false
        ...
    }
}