From 013139f18e11f67bb83f7714c1e76216fb0a7789 Mon Sep 17 00:00:00 2001
From: Yahor Berdnikau <yahor.berdnikau@jetbrains.com>
Date: Thu, 30 Sep 2021 14:01:54 +0200
Subject: [PATCH] Unset MapProperty if not task outputs is present.

By default, Gradle creates such property as empty. 'isPresent' returns
'true' in such case.

^KT-46406 Fixed
---
 .../kotlin/compilerRunner/GradleCompilerRunnerWithWorkers.kt   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/compilerRunner/GradleCompilerRunnerWithWorkers.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/compilerRunner/GradleCompilerRunnerWithWorkers.kt
index 8c4d439be99..618417e9b92 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/compilerRunner/GradleCompilerRunnerWithWorkers.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/compilerRunner/GradleCompilerRunnerWithWorkers.kt
@@ -42,6 +42,9 @@ internal class GradleCompilerRunnerWithWorkers(
                 it.taskOutputs.from(taskOutputsBackup.outputs)
                 it.taskOutputsSnapshot.set(taskOutputsBackup.previousOutputs)
                 it.metricsReporter.set(buildMetrics)
+            } else {
+                // MapProperty has empty value by default: https://github.com/gradle/gradle/issues/7485
+                it.taskOutputsSnapshot.set(null as Map<File, Array<Byte>>?)
             }
         }
         return workQueue