Warning: The rule `-keep public class *extends java.lang.annotation.Annotation { <all>; }` uses extends but actually matches implements. [72080964]

Fixed

Bug

Status Update

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Description

[Deleted User]

created issue #1

Jan 17, 2018 09:54AM

Include the following information that is specific for problems related to building your projects or problems with Gradle sync:

Gradle version: 4.4
Android Plugin Version: 3.1.0-alpha08
Module Compile Sdk Version: 27
Module Build Tools Version: automatic, resolves to 27.0.1
Android SDK Tools version: 26.1.1

When building my production build, the following warning is produced

Warning: The rule `-keep public class *extends java.lang.annotation.Annotation {
<all>;
}` uses extends but actually matches implements.

I don't have such a rule in my Proguard config.

A quick Google search lead me to

https://android.googlesource.com/platform/tools/base/+/gradle_1.0.0/build-system/gradle/src/main/groovy/com/android/build/gradle/internal/tasks/multidex/CreateManifestKeepList.groovy, not sure how relevant that is.

Comments

uc...@google.com <uc...@google.com> #2Jan 22, 2018 11:42PM

Assigned to uc...@google.com.

can you share a sample project to reproduce this issue.

[Deleted User] <[Deleted User]> #3Jan 23, 2018 09:08AM

I'm still trying to find a minimal reproducible example, but I noticed that the warning is actually produced in the transformClassesWithDexBuilderForDebug task.

[Deleted User] <[Deleted User]> #4Apr 2, 2018 11:33AM

i also get this error but only when doing a production signed release on the new android studio 3.1, i cant give you my project entirely but is there something else you can view ? like proguard build or something ?

uc...@google.com <uc...@google.com> #5Apr 2, 2018 09:36PM

can you share a sample project to reproduce this issue

[Deleted User] <[Deleted User]> #6Apr 5, 2018 05:49AM

I am getting same error. Did you find any solutions???

[Deleted User] <[Deleted User]> #7Apr 5, 2018 05:51AM

just look at this

Screenshot from 2018-04-05 11-20-47.png

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uc...@google.com <uc...@google.com> Apr 5, 2018 06:06PM

Reassigned to je...@google.com.

ha...@gmail.com <ha...@gmail.com> #8Apr 5, 2018 09:45PM

me too i have a problem

je...@google.com <je...@google.com> Apr 5, 2018 10:19PM

Reassigned to ga...@google.com.

vw...@gmail.com <vw...@gmail.com> #9Apr 6, 2018 06:37AM

I am also struggling with this issue. Please advise on a workaround or a fix.

da...@gmail.com <da...@gmail.com> #10Apr 6, 2018 09:48AM

Same problem here after update Android studio to 3.1

ga...@google.com <ga...@google.com> #11Apr 6, 2018 11:08AM

Accepted by ga...@google.com.

To clarify, this is a warning, not an error, from R8, which we use to compute the list of classes for the main dex, in legacy multidex variant. It does not affect the output, and it should not cause build nor runtime failures.

I am working on a fix to change this keep rule to "-keep public class * implements java.lang.annotation.Annotation", which is semantically the same, and removes the warning.

ga...@google.com <ga...@google.com> #12Apr 6, 2018 12:28PM

Marked as fixed.

The fix to remove the warning message will be released in 3.2.0-alpha12.

Fixed in ag/Ib1807e9aee480583e879da19976f5d3ef6f36a41

qq...@gmail.com <qq...@gmail.com> #13Apr 24, 2018 03:17PM

I find a answer on the stackOverFlow
that when I remove this code "multiDexEnabled true" on my gradle ,and then the warning is miss.
this is the link "

https://stackoverflow.com/questions/49518115/android-studio-3-1-warning-the-rule-keep-public-class-extends-java-lang-anno"

jo...@gmail.com <jo...@gmail.com> #14Apr 24, 2018 04:10PM

Isn't it simply the rule which is defined in the "mainDexClasses.rules" file under the "<android-sdk-dir>/build-tools/<android-version>/" directory which should be changed to "-keep public class * implements java.lang.annotation.Annotation { *; }"?

st...@gmail.com <st...@gmail.com> #15Apr 28, 2018 03:30PM

ty a lot :) (Y)

[Deleted User] <[Deleted User]> #16Apr 30, 2018 08:39AM

I am facing similar issue. Is there any proper fix? Please update
Thanks

ga...@google.com <ga...@google.com> #17Apr 30, 2018 09:51AM

Please see

comment #11

. As mentioned there, this is not an error, but a warning message which does not affect the output in any way. The keep rule is fixed in 3.2.0-alpha12.

[Deleted User] <[Deleted User]> #18Apr 30, 2018 10:58AM

Thanks

ba...@gmail.com <ba...@gmail.com> #19Aug 2, 2018 03:38PM

The rule `-keep public class *extends java.lang.annotation.Annotation {
what i should do ??? plz help me

pa...@gmail.com <pa...@gmail.com> #20Aug 2, 2018 04:52PM

ba... / #19 nothing you can do, it's generated code by Android Gradle Plugin or one of its dependencies.
It's a warning only, not an error, so you should have no problems building stuff.
It's fixed in 3.2.0-alpha12, so if you use 3.2 betas (3.2.0-beta05 is latest at this time) or RCs you should not see this any more.

az...@gmail.com <az...@gmail.com> #21Sep 25, 2018 03:15AM

Just a side note: Simply installing AS 3.2 is not enough. You may need to update the gradle plugin to 4.6 & android build gradle to 3.2.0 - which I'm not able to yet because of project constraints.

ms...@gmail.com <ms...@gmail.com> #22Jan 17, 2019 08:38AM

InnerClass annotations are missing corresponding EnclosingMember annotations. Such InnerClass annotations are ignored.
Message{kind=WARNING, text=InnerClass annotations are missing corresponding EnclosingMember annotations. Such InnerClass annotations are ignored., sources=[Unknown source file], tool name=Optional.of(D8)}

plugin to 4.9
android build gradle to 3.2.1
minSdkVersion 15
targetSdkVersion 28

I am getting same error, please help me to resolve

Thank you