Merge "Couple fixes for M11nGestureHandler"

1 files changed, 13 insertions, 1 deletions

diff --git a/core/java/android/util/ExceptionUtils.java b/core/java/android/util/ExceptionUtils.java
index da7387fcae70..1a397b39ef3c 100644
--- a/core/java/android/util/ExceptionUtils.java
+++ b/core/java/android/util/ExceptionUtils.java
@@ -86,4 +86,16 @@ public class ExceptionUtils {
         while (t.getCause() != null) t = t.getCause();
         return t;
     }
-}
+
+    /**
+     * Appends {@code cause} at the end of the causal chain of {@code t}
+     *
+     * @return {@code t} for convenience
+     */
+    public static @NonNull Throwable appendCause(@NonNull Throwable t, @Nullable Throwable cause) {
+        if (cause != null) {
+            getRootCause(t).initCause(cause);
+        }
+        return t;
+    }
+}
\ No newline at end of file