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-rw-r--r--src/core/lombok/core/PostCompiler.java10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/core/lombok/core/PostCompiler.java b/src/core/lombok/core/PostCompiler.java
index 72f4b3a2..122bb268 100644
--- a/src/core/lombok/core/PostCompiler.java
+++ b/src/core/lombok/core/PostCompiler.java
@@ -28,6 +28,7 @@ import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Collections;
import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
public final class PostCompiler {
private PostCompiler() {/* prevent instantiation*/};
@@ -67,8 +68,17 @@ public final class PostCompiler {
public static OutputStream wrapOutputStream(final OutputStream originalStream, final String fileName, final DiagnosticsReceiver diagnostics) throws IOException {
if (System.getProperty("lombok.disablePostCompiler", null) != null) return originalStream;
+
+ // close() can be called more than once and should be idempotent, therefore, ensure we never transform more than once.
+ final AtomicBoolean closed = new AtomicBoolean();
+
return new ByteArrayOutputStream() {
@Override public void close() throws IOException {
+ if (closed.getAndSet(true)) {
+ originalStream.close();
+ return;
+ }
+
// no need to call super
byte[] original = toByteArray();
byte[] copy = null;