/**
 * JVM internal name of the class, where package names are separated by '/', and class names are separated by '$',
 * for example: `"org/foo/bar/Baz$Nested"`
 */
val ClassName.jvmInternalName: String
    get() =
        if (this.isLocal) substring(1)
        else replace('/', '$')

Isn't it supposed to replace

.

with

$

, not

/

with

$

?

On bytecode level jvm uses

/

, not

.

like in source code. You can open any bytecode and check

java.lang.String

becomes

java/lang/String

@Marc Knaup seems so. Could you please report a bug?

done: https://youtrack.jetbrains.com/issue/KT-28682