From d7e97c0ae1a7a7791d84381745ade73e3de0dfbb Mon Sep 17 00:00:00 2001
From: Jason Penilla <11360596+jpenilla@users.noreply.github.com>
Date: Wed, 22 Sep 2021 22:39:58 -0700
Subject: [PATCH] Synchronize access to
 AccessTransformSet$Class#getOrCreateClass

---
 paperweight-lib/src/main/kotlin/tasks/ApplyAccessTransform.kt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/paperweight-lib/src/main/kotlin/tasks/ApplyAccessTransform.kt b/paperweight-lib/src/main/kotlin/tasks/ApplyAccessTransform.kt
index 1d2715b..ad1ec75 100644
--- a/paperweight-lib/src/main/kotlin/tasks/ApplyAccessTransform.kt
+++ b/paperweight-lib/src/main/kotlin/tasks/ApplyAccessTransform.kt
@@ -170,8 +170,9 @@ class AccessTransformerVisitor(
         super.visitInnerClass(name, outerName, innerName, completedClassAt(name).get().apply(access))
     }
 
-    private fun completedClassAt(className: String): AccessTransformSet.Class =
+    private fun completedClassAt(className: String): AccessTransformSet.Class = synchronized(at) {
         at.getOrCreateClass(className).apply { complete(inheritanceProvider) }
+    }
 }
 
 private const val RESET_ACCESS: Int = (Opcodes.ACC_PUBLIC or Opcodes.ACC_PRIVATE or Opcodes.ACC_PROTECTED).inv()