Kapt: Disable location mapping by default, allow to enable it manually

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kapt3IT.kt

@@ -301,6 +301,32 @@ open class Kapt3IT : Kapt3BaseIT() {
         }
     }
 
+    @Test
+    fun testLocationMapping() {
+        val project = Project("locationMapping", GRADLE_VERSION, directoryPrefix = "kapt2")
+
+        project.build("build") {
+            assertFailed()
+
+            assertContains("Test.java:9: error: GenError element")
+            assertContains("Test.java:17: error: GenError element")
+        }
+
+        project.projectDir.getFileByName("build.gradle").modify {
+            it.replace("mapDiagnosticLocations = false", "mapDiagnosticLocations = true")
+        }
+
+        project.build("build") {
+            assertFailed()
+
+            assertNotContains("Test.java:9: error: GenError element")
+            assertNotContains("Test.java:17: error: GenError element")
+
+            assertContains("test.kt:3: error: GenError element")
+            assertContains("test.kt:7: error: GenError element")
+        }
+    }
+
     @Test
     fun testChangesInLocalAnnotationProcessor() {
         val project = Project("localAnnotationProcessor", GRADLE_VERSION, directoryPrefix = "kapt2")

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/locationMapping/build.gradle

@@ -0,0 +1,29 @@
+buildscript {
+    repositories {
+        mavenLocal()
+        mavenCentral()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+apply plugin: "java"
+apply plugin: "kotlin"
+apply plugin: "kotlin-kapt"
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+}
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    compile "org.jetbrains.kotlin:annotation-processor-example:$kotlin_version"
+    kapt "org.jetbrains.kotlin:annotation-processor-example:$kotlin_version"
+    testCompile 'junit:junit:4.12'
+}
+
+kapt {
+    mapDiagnosticLocations = false
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/locationMapping/src/main/java/test.kt

@@ -0,0 +1,8 @@
+package example
+
+class Test {
+    @field:example.GenError
+    val a: String
+
+    fun b(@example.GenError a: Boolean) {}
+}