1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/BazelLibrary.java b/src/main/java/com/google/devtools/build/lib/syntax/BazelLibrary.java
index cef1d1d947..6f1d1ac30b 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/BazelLibrary.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/BazelLibrary.java
@@ -267,7 +267,7 @@ public class BazelLibrary {
       new BuiltinFunction("to_list") {
         @SuppressWarnings("unused")
         public MutableList<Object> invoke(SkylarkNestedSet input, Environment env) {
-          return new MutableList<>(input.toCollection(), env);
+          return MutableList.copyOf(env, input.toCollection());
         }
       };