IssueTracker

Oops, missed copying in some of the dex bytecode for the relevant class:

.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;

    .line 41
    .line 42 <-- this is the line that the stacktrace claims is bad
    :goto_29
    iput-object p2, p0, Lcom/squareup/example/RealClientAuthenticityProvider;->authenticationProviderAccess:Lcom/squareup/authentication/AuthenticationProviderAccess;

Thank you for the report. From the face of it the error looks quite surprising.

Looking at the smali in comment #2, there is something odd about the line numbers. The assignment of provider is on line 32, and line 42 is assigning a different field. Has the stack trace been retraced, or is it from the raw crash?

The constructor of AuthenticationProviderAccess has been inlined into the RealClientAuthenticityProvider constructor setting the provider field there. Do you know why you get pX register names in the smali code? Normally that is only used for argument registers, but the <init> only has one argument (this in p0) so I would have expected the rest to be using names vX.

Will it be possible for you to share a [compiler dump] for us to reproduce building the DEX with the issue? If not can you share the full APK so we can inspect the DEX? You can share these artifacts privately with sgjesse@google.com and christofferqa@google.com.

To try to workaround the issue you can try to keep the AuthenticationProviderAccess constructor to see if that makes a difference:

-keep class com.squareup.authentication.AuthenticationProviderAccess {
  <init>();
}

Just relaized that I forgot the link to compiler dump in comment #3.