NPE in ClassReferenceFixer$KotlinReferenceFixer. visitEnumArgument when obfuscation is enabled

[Krupal32]

ProGuard 7.9.1 throws NPE when obfuscation is enabled during Kotlin
metadata
reference fixing. The crash is non-deterministic (depends on class
iteration order).

 Stack trace:                                                            
 java.lang.NullPointerException: Cannot invoke "proguard.classfile.      
 Clazz.getName()"                                                        
   because "value.referencedClass" is null                               
         at proguard.classfile.editor.                                   
 ClassReferenceFixer$KotlinReferenceFixer                                
            .visitEnumArgument(ClassReferenceFixer.java:927)             
         at proguard.classfile.kotlin.                                   
 KotlinAnnotationArgument$EnumValue.accept(...)                          
         ...                                                             
         at proguard.obfuscate.Obfuscator.execute(Obfuscator.java:708)   

[Krupal32]

java-2026-06-10-17-19-43-out.txt