Android build example failing with "Type rust.miniquad.example.quad.MainActivity$1 is defined multiple times"

[jmetz]

The example in the readme fails:

docker run --rm -v $(pwd)":/root/src" -w /root/src notfl3/cargo-apk cargo quad-apk build --example quad   
   ...
5 warnings                                                                                                                                                                                      
Error in /root/src/target/android-artifacts/debug/examples/quad/build/obj/rust/miniquad/example/quad/MainActivity$1.class:                                                                      
Type rust.miniquad.example.quad.MainActivity$1 is defined multiple times: /root/src/target/android-artifacts/debug/examples/quad/build/obj/rust/miniquad/example/quad/MainActivity$1.class, /roo
t/src/target/android-artifacts/debug/examples/quad/build/obj/rust/miniquad/example/quad/MainActivity_1.class                                                                                    
Compilation failed                            
Exception in thread "main" java.lang.RuntimeException: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: /root/src/target/android-artifacts/debug/example
s/quad/build/obj/rust/miniquad/example/quad/MainActivity$1.class                                                                                                                                
        at com.android.tools.r8.utils.w.a(SourceFile:92)
        at com.android.tools.r8.D8.main(D8.java:4)
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete, origin: /root/src/target/android-artifacts/debug/examples/quad/build/obj/rust/miniquad/example/quad/
MainActivity$1.class
        at Version.fakeStackEntry(Version_3.0.41-dev.java:0)
        at com.android.tools.r8.utils.w.a(SourceFile:68)
        at com.android.tools.r8.utils.w.a(SourceFile:28)
        at com.android.tools.r8.utils.w.a(SourceFile:27)
        at com.android.tools.r8.utils.w.b(SourceFile:3)
        at com.android.tools.r8.D8.a(D8.java:17) 
        at com.android.tools.r8.D8.a(D8.java:15) 
        at com.android.tools.r8.utils.w.a(SourceFile:84)
        ... 1 more

Version: Current (31ac0af)