IssueTracker

Thanks for reaching out. The example is showing an actual error in D8, as your compilation mode is using the default mode in the command builder which is "debug". Thus m_instream can be modified at any time by an attached debugger and it is invalid for D8 to assume its value. Even in release mode compilation if m_instream is a field D8 would generally also need to assume it could have any value.

I'll investigate what is going on and update here once I have more info.

Thanks for looking so quickly! Here is the original source code (it's a single file):

https://www.cs.princeton.edu/~appel/modern/java/JLex/current/Main.java

m_instream and m_outstream are indeed fields.

This issue is caused by running the redundant field load/store elimination in debug mode. That should be disabled.

A previous attempt at disabling failed due to memory regressions: b/218282718. We should look into the cause of those regressions (if still present) and find a way of resolving them.

FYI, a fix is in CL https://r8-review.git.corp.google.com/c/r8/+/87300

It is currently blocked on landing pending some resolution of b/218282718.

Thank you!

I am curious, is this issue unlikely to be solved in the near future? If so, we will just code up a workaround for now in WALA, so we can continue with updating our r8 dependence. Thanks again!

It might take a bit of time to look into the concerns from comment #6, but the optimization should be disabled in debug mode if at all possible.

A fix has been pushed to 8.0, 8.1, 8.2 and 8.3 branches for R8.

To use one of the fixed versions without AGP updates amend your settings.gradle or settings.gradle.kts file with:

pluginManagement {
    buildscript {
        repositories {
            mavenCentral()
            maven {
                url = uri("https://storage.googleapis.com/r8-releases/raw")
            }
        }
        dependencies {
           classpath("com.android.tools:r8:8.2.46") // <-- Use version matching your AGP here
        }
    }
}

Since AGP 8, the R8 versions follow those of AGP, so if using AGP 8.2 use the latest version on the R8 8.2 branch (for this issue 8.2.46 or any later patch version).

Thank you for fixing this issue!

Thank you for your patience while our engineering team worked to resolve this issue. A fix for this issue is now available in:

• Android Studio Hedgehog | 2023.1.1 Patch 2
• Android Gradle Plugin 8.2.2

We encourage you to try the latest update.

If you notice further issues or have questions, please file a new bug report.

Thank you for taking the time to submit feedback — we really appreciate it!

Comment added by automation: A postmortem has been automatically requested for this issue. Please author a postmortem on IRM. See go/android-postmortem-guidance for more context and details, including how to handle the case when this issue does not need a postmortem. If you have any questions not answered by go/android-postmortem-guidance, please email android-hygiene-tpm@, instead of reassigning the fixed bug. Thank you.

The fixes for this issue are now also available in:

• Android Studio Iguana | 2023.2.1 RC 1
• Android Gradle Plugin 8.3.0-rc01

We encourage you to try the latest update.

If you notice further issues or have questions, please file a new bug report.