From b1f1511910dec25dc4501808d6280f349f72d101 Mon Sep 17 00:00:00 2001
From: jhorvitz <jhorvitz@google.com>
Date: Thu, 25 Mar 2021 17:45:32 -0700
Subject: [PATCH] Allow specifying a cause in `MissingNestedSetException`.

PiperOrigin-RevId: 365161375
---
 .../build/lib/collect/nestedset/NestedSetStore.java        | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetStore.java b/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetStore.java
index c62b833cc1a465..b88805bccf0f46 100644
--- a/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetStore.java
+++ b/src/main/java/com/google/devtools/build/lib/collect/nestedset/NestedSetStore.java
@@ -79,8 +79,13 @@ public class NestedSetStore {
    * that does not exist in the store.
    */
   public static final class MissingNestedSetException extends Exception {
+
     public MissingNestedSetException(ByteString fingerprint) {
-      super("No NestedSet data for " + fingerprint);
+      this(fingerprint, /*cause=*/ null);
+    }
+
+    public MissingNestedSetException(ByteString fingerprint, @Nullable Throwable cause) {
+      super("No NestedSet data for " + fingerprint, cause);
     }
   }