IssueTracker

Using AGP 8.7.1 we're seeing a strange runtime crash from a build that has been minified with R8:

java.lang.IllegalAccessError: Field 'com.squareup.authentication.AuthenticationProviderAccess.provider' is inaccessible to class 'com.squareup.example.RealClientAuthenticityProvider' (declaration of 'com.squareup.example.RealClientAuthenticityProvider' appears in /data/app/.../base.apk!classes2.dex)
	t com.squareup.example.RealClientAuthenticityProvider.<init>(RealClientAuthenticityProvider.kt:42)
																		

R8 is mangling the private field in this class somehow that makes it crash:

package com.squareup.authentication;

public class AuthenticationProviderAccess {

  private AuthenticationProviderAccessCompat provider;

  public AuthenticationProviderAccess() {
    provider = new AuthenticationProviderAccessFuture();
  }

  // other methods
}

package com.squareup.example

import com.squareup.authentication.AuthenticationProviderAccess

class RealClientAuthenticityProvider() : ClientAuthenticityProvider {

  private val authenticationProviderAccess: AuthenticationProviderAccess =
    AuthenticationProviderAccess()

  // other methods
}

The dex bytecode for those two classes are:

.class public final Lcom/squareup/authentication/AuthenticationProviderAccess;
.super Ljava/lang/Object;
.source "AuthenticationProviderAccess.java"


# instance fields
.field public provider:Lcom/squareup/authentication/AuthenticationProviderAccessCompat;

.class public final Lcom/squareup/example/RealClientAuthenticityProvider;
.super Ljava/lang/Object;
.source "RealClientAuthenticityProvider.kt"

# interfaces
.implements Lcom/squareup/example/ClientAuthenticityProvider;

# instance fields
.field public final authenticationProviderAccess:Lcom/squareup/authentication/AuthenticationProviderAccess;
    .annotation build Lorg/jetbrains/annotations/NotNull;
    .end annotation
.end field

# direct methods
.method public constructor <init>()V
<snip>
    .line 26
    .line 27
    new-instance p1, Lcom/squareup/authentication/AuthenticationProviderAccessFuture;

    .line 28
    .line 29
    invoke-direct {p1}, Lcom/squareup/authentication/AuthenticationProviderAccessFuture;-><init>()V

    .line 30
    .line 31
    .line 32
    iput-object p1, p2, Lcom/squareup/authentication/AuthenticationProviderAccess;->provider:Lcom/squareup/authentication/AuthenticationProviderAccessCompat;