kapt: Do not fail if annotations.txt file does not exist

libraries/tools/kotlin-annotation-processing/src/main/kotlin/org/jetbrains/kotlin/annotation/AnnotationProcessorWrapper.kt

@@ -16,6 +16,7 @@
 
 package org.jetbrains.kotlin.annotation
 
+import java.io.IOException
 import javax.annotation.processing.*
 import javax.lang.model.SourceVersion
 import javax.lang.model.element.AnnotationMirror
@@ -75,8 +76,12 @@ public abstract class AnnotationProcessorWrapper(
             return
         }
 
-        val annotationsTxt = processingEnv.getFiler().getResource(StandardLocation.CLASS_PATH, "", "annotations.$taskQualifier.txt")
-        kotlinAnnotationsProvider = FileObjectKotlinAnnotationProvider(annotationsTxt)
+        try {
+            val annotationsTxt = processingEnv.getFiler().getResource(StandardLocation.CLASS_PATH, "", "annotations.$taskQualifier.txt")
+            kotlinAnnotationsProvider = FileObjectKotlinAnnotationProvider(annotationsTxt)
+        } catch (e: IOException) {
+            kotlinAnnotationsProvider = EmptyKotlinAnnotationsProvider()
+        }
 
         processor.init(processingEnv)
     }

libraries/tools/kotlin-annotation-processing/src/main/kotlin/org/jetbrains/kotlin/annotation/KotlinAnnotationProvider.kt

@@ -104,4 +104,8 @@ public abstract class KotlinAnnotationProvider {
 public class FileObjectKotlinAnnotationProvider(val annotationsFileObject: FileObject): KotlinAnnotationProvider() {
     override val serializedAnnotations: String
         get() = annotationsFileObject.getCharContent(false).toString()
+}
+
+public class EmptyKotlinAnnotationsProvider : KotlinAnnotationProvider() {
+    override val serializedAnnotations = ""
 }