IssueTracker

Currently doing some researches about the issue being a regression or a coroutines 1.3.7 change but R8 2.0.74 generate wrong bytecode that leads to crash

     Caused by: java.lang.NoSuchMethodError: No static method $load2()Ljava/util/Iterator; in class La; or its super classes (declaration of 'a' appears in base.apk)
        at w3.a.w2.o.a(MainDispatchers.kt:1)

Effectively the byte code for that file contains a try to call the load2 from $$ServiceLoaderMethods:

.method public final a()Lw3/a/a2;
    .registers 6

    const-string v0, "Module with the Main dispatcher is missing. Add dependency providing the Main dispatcher, e.g. \'kotlinx-coroutines-android\' and ensure it has the same version as \'kotlinx-coroutines-core\'"

    .line 1
    :try_start_2
    invoke-static {}, La;->$load2()Ljava/util/Iterator;

    move-result-object v1

But mapping only shows :

$$ServiceLoaderMethods -> a:
    java.util.Iterator $load1() -> a

And bycode of ServiceLoaderMethods effectively only contains the load1 method, so load2 is missing and the crash is normal :

# direct methods
.method public static a()Ljava/util/Iterator;
    .registers 3

    const/4 v0, 0x1

    :try_start_1
    new-array v0, v0, [Lkotlinx/coroutines/CoroutineExceptionHandler;

    const/4 v1, 0x0

    new-instance v2, Lkotlinx/coroutines/android/AndroidExceptionPreHandler;

    invoke-direct {v2}, Lkotlinx/coroutines/android/AndroidExceptionPreHandler;-><init>()V

    aput-object v2, v0, v1

    invoke-static {v0}, Ljava/util/Arrays;->asList([Ljava/lang/Object;)Ljava/util/List;

    move-result-object v0

    invoke-interface {v0}, Ljava/util/List;->iterator()Ljava/util/Iterator;

    move-result-object v0
    :try_end_13
    .catchall {:try_start_1 .. :try_end_13} :catchall_14

    return-object v0

    :catchall_14
    move-exception v0

    new-instance v1, Ljava/util/ServiceConfigurationError;

    invoke-virtual {v0}, Ljava/lang/Throwable;->getMessage()Ljava/lang/String;

    move-result-object v2

    invoke-direct {v1, v2, v0}, Ljava/util/ServiceConfigurationError;-><init>(Ljava/lang/String;Ljava/lang/Throwable;)V

    throw v1
.end method