Add explicit set of supported file types to KotlinPositionManager

idea/idea-jvm/src/org/jetbrains/kotlin/idea/debugger/KotlinPositionManager.kt

@@ -26,6 +26,7 @@ import com.intellij.debugger.engine.evaluation.EvaluationContext
 import com.intellij.debugger.impl.DebuggerUtilsEx
 import com.intellij.debugger.jdi.StackFrameProxyImpl
 import com.intellij.debugger.requests.ClassPrepareRequestor
+import com.intellij.openapi.fileTypes.FileType
 import com.intellij.openapi.project.DumbService
 import com.intellij.openapi.roots.ProjectRootManager
 import com.intellij.openapi.util.Computable
@@ -44,6 +45,7 @@ import com.sun.jdi.ReferenceType
 import com.sun.jdi.request.ClassPrepareRequest
 import org.jetbrains.kotlin.codegen.inline.KOTLIN_STRATA_NAME
 import org.jetbrains.kotlin.fileClasses.JvmFileClassUtil
+import org.jetbrains.kotlin.idea.KotlinFileTypeFactory
 import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
 import org.jetbrains.kotlin.idea.debugger.breakpoints.getLambdasAtLineIfAny
 import org.jetbrains.kotlin.idea.debugger.evaluate.KotlinCodeFragmentFactory
@@ -85,6 +87,8 @@ class KotlinPositionManager(private val myDebugProcess: DebugProcess) : MultiReq
             allKotlinFilesScope
     )
 
+    override fun getAcceptedFileTypes(): Set<FileType> = KotlinFileTypeFactory.KOTLIN_FILE_TYPES_SET
+
     override fun evaluateCondition(context: EvaluationContext, frame: StackFrameProxyImpl, location: Location, expression: String): ThreeState? {
         return ThreeState.UNSURE
     }