Proguard issues with 1.3.6/1.3.7

[ZakTaccardi]

Seems that 1.3.6/1.3.7 bring in the -debug artifact, which causes compilation issues when minifying with proguard (using 6.2.2).

Output for 1.3.7:

Note: there were 17 duplicate class definitions.
      (http://proguard.sourceforge.net/manual/troubleshooting.html#duplicateclass)
Warning: kotlinx.coroutines.debug.AgentPremain$DebugProbesTransformer: can't find superclass or interface java.lang.instrument.ClassFileTransformer
Warning: kotlinx.coroutines.debug.AgentPremain$installSignalHandler$1: can't find superclass or interface sun.misc.SignalHandler
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.ClassFileTransformer
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.SignalHandler
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain$DebugProbesTransformer: can't find referenced class java.lang.instrument.ClassFileTransformer
Warning: kotlinx.coroutines.debug.AgentPremain$installSignalHandler$1: can't find referenced class sun.misc.SignalHandlerNote: there were 17 duplicate class definitions.
      (http://proguard.sourceforge.net/manual/troubleshooting.html#duplicateclass)
Warning: kotlinx.coroutines.debug.AgentPremain$DebugProbesTransformer: can't find superclass or interface java.lang.instrument.ClassFileTransformer
Warning: kotlinx.coroutines.debug.AgentPremain$installSignalHandler$1: can't find superclass or interface sun.misc.SignalHandler
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.ClassFileTransformer
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.SignalHandler
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain: can't find referenced class java.lang.instrument.Instrumentation
Warning: kotlinx.coroutines.debug.AgentPremain$DebugProbesTransformer: can't find referenced class java.lang.instrument.ClassFileTransformer
Warning: kotlinx.coroutines.debug.AgentPremain$installSignalHandler$1: can't find referenced class sun.misc.SignalHandler
Warning: kotlinx.coroutines.debug.AgentPremain$installSignalHandler$1: can't find referenced class sun.misc.Signal
Warning: kotlinx.coroutines.debug.AgentPremain$installSignalHandler$1: can't find referenced class sun.misc.Signal
Warning: there were 15 unresolved references to classes or interfaces.
         You may need to add missing library jars or update their versions.
         If your code works fine without the missing classes, you can suppress
         the warnings with '-dontwarn' options.
         (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedclass)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':sample:minifyReleaseWithProguard'.
> java.io.IOException: Please correct the above warnings first.

Issue does not reproduce with 1.3.5

[ZakTaccardi]

May be related to #2023 somewhat

[ZakTaccardi]

Note: this fixes the issue

-dontwarn java.lang.instrument.ClassFileTransformer
-dontwarn sun.misc.SignalHandler
-dontwarn java.lang.instrument.Instrumentation
-dontwarn sun.misc.Signal

But I'm not sure if that is a safe thing to do? Ideally the coroutines artifact would ship with these proguard rules if these -dontwarns are correct

[HeyAlex]

same problem

[qwwdfsad]

It is a safe thing to do, thanks for suggesting, we'll start shipping these rules along with core artifact

[mhmdreza]

same Problem.

[IgorGanapolsky]

-dontwarn java.lang.instrument.ClassFileTransformer
-dontwarn sun.misc.SignalHandler
-dontwarn java.lang.instrument.Instrumentation
-dontwarn sun.misc.Signal

I am still getting this build error:

Note: there were 45 unresolved dynamic references to classes or interfaces.
You should check if you need to specify additional program jars.
(https://www.guardsquare.com/proguard/manual/troubleshooting#dynamicalclass)
Warning: there were 6 unresolved references to program class members.
Your input classes appear to be inconsistent.
You may need to recompile the code.
(https://www.guardsquare.com/proguard/manual/troubleshooting#unresolvedprogramclassmember)

[tyvsmith]

When upgrading to 1.4, we saw this errors appeared in addition to this one on DelayKt.

Warning: kotlinx.coroutines.DelayKt: can't find referenced method 'double getZERO()' in program class kotlin.time.Duration$Companion Warning: there were 1 unresolved references to program class members. Your input classes appear to be inconsistent. You may need to recompile the code. (https://www.guardsquare.com/proguard/manual/troubleshooting#unresolvedprogramclassmember)

I've added -dontwarn kotlin.time.Duration$Companion as well as the others listed here to unblock.

[Ayfri]

Still getting the problem in 1.6.0.
I have this error exactly :

Error: Missing class android.annotation.SuppressLint (referenced from: kotlinx.coroutines.debug.AgentPremain)