Kotlin: Catch exception thrown by kotlinc

Author: tamasvajk

java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt

@@ -97,8 +97,15 @@ open class KotlinFileExtractor(
         if (d.isFakeOverride) {
             return true
         }
-        if ((d as? IrFunction)?.descriptor?.isHiddenToOvercomeSignatureClash == true) {
-            return true
+        try {
+            if ((d as? IrFunction)?.descriptor?.isHiddenToOvercomeSignatureClash == true) {
+                return true
+            }
+        }
+        catch (e: NotImplementedError) {
+            // `org.jetbrains.kotlin.ir.descriptors.IrBasedClassConstructorDescriptor.isHiddenToOvercomeSignatureClash` throws the exception
+            logger.warnElement("Couldn't query if element is fake, deciding it's not.", d, e)
+            return false
         }
         return false
     }

java/kotlin-extractor/src/main/kotlin/utils/Logger.kt

@@ -248,15 +248,15 @@ open class Logger(val loggerBase: LoggerBase, open val tw: TrapWriter) {
 }
 
 class FileLogger(loggerBase: LoggerBase, override val tw: FileTrapWriter): Logger(loggerBase, tw) {
-    fun warnElement(msg: String, element: IrElement) {
+    fun warnElement(msg: String, element: IrElement, exn: Throwable? = null) {
         val locationString = tw.getLocationString(element)
         val mkLocationId = { tw.getLocation(element) }
-        loggerBase.diagnostic(tw, Severity.Warn, msg, null, locationString, mkLocationId)
+        loggerBase.diagnostic(tw, Severity.Warn, msg, exn?.stackTraceToString(), locationString, mkLocationId)
     }
 
-    fun errorElement(msg: String, element: IrElement) {
+    fun errorElement(msg: String, element: IrElement, exn: Throwable? = null) {
         val locationString = tw.getLocationString(element)
         val mkLocationId = { tw.getLocation(element) }
-        loggerBase.diagnostic(tw, Severity.Error, msg, null, locationString, mkLocationId)
+        loggerBase.diagnostic(tw, Severity.Error, msg, exn?.stackTraceToString(), locationString, mkLocationId)
     }
 }