2 files changed, 4 insertions, 3 deletions
diff --git a/core/src/main/kotlin/links/DRI.kt b/core/src/main/kotlin/links/DRI.kt
index a69fa4e3..25b9546f 100644
--- a/core/src/main/kotlin/links/DRI.kt
+++ b/core/src/main/kotlin/links/DRI.kt
@@ -19,6 +19,7 @@ data class DRI(
 
     companion object {
         val topLevel = DRI()
+
     }
 }
 
diff --git a/core/src/main/kotlin/plugability/DokkaContext.kt b/core/src/main/kotlin/plugability/DokkaContext.kt
index ee3215cc..9c9e6978 100644
--- a/core/src/main/kotlin/plugability/DokkaContext.kt
+++ b/core/src/main/kotlin/plugability/DokkaContext.kt
@@ -1,6 +1,5 @@
 package org.jetbrains.dokka.plugability
 
-import org.jetbrains.dokka.CoreExtensions
 import org.jetbrains.dokka.DokkaConfiguration
 import org.jetbrains.dokka.utilities.DokkaLogger
 import java.io.File
@@ -9,7 +8,6 @@ import java.util.*
 import kotlin.reflect.KClass
 import kotlin.reflect.full.createInstance
 
-
 interface DokkaContext {
     fun <T : DokkaPlugin> plugin(kclass: KClass<T>): T?
 
@@ -22,7 +20,6 @@ interface DokkaContext {
     val configuration: DokkaConfiguration
     val unusedPoints: Collection<ExtensionPoint<*>>
 
-
     companion object {
         fun create(
             configuration: DokkaConfiguration,
@@ -192,6 +189,9 @@ private class DokkaContextConfigurationImpl(
         }
 
         if (extension.override is OverrideKind.Present) {
+            fun root(ext: Extension<*, *, *>): List<Extension<*, *, *>> = if (ext.override is OverrideKind.Present) ext.override.overriden.flatMap(::root) else listOf(ext)
+            if (extension.override.overriden.size > 1 && root(extension).distinct().size > 1)
+                throw IllegalStateException("Extension $extension overrides extensions without common root")
             extension.override.overriden.forEach { overriden ->
                 suppressedExtensions.listFor(overriden) += Suppression.ByExtension(extension)
             }