Clarify what "fancy" means.

--
MOS_MIGRATED_REVID=89710872

1 files changed, 4 insertions, 2 deletions

diff --git a/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java b/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java
index b04fec642d..4f8dcfd229 100644
--- a/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java
+++ b/src/main/java/com/google/devtools/build/skyframe/ParallelEvaluator.java
@@ -353,8 +353,10 @@ public final class ParallelEvaluator implements Evaluator {
         }
 
         if (bubbleErrorInfo != null) {
-          // Set interrupted status, so that calling SkyFunction doesn't try anything fancy after
-          // this.
+          // Set interrupted status, to try to prevent the calling SkyFunction from doing anything
+          // fancy after this. SkyFunctions executed during error bubbling are supposed to
+          // (quickly) rethrow errors or return a value/null (but there's currently no way to
+          // enforce this).
           Thread.currentThread().interrupt();
         }
         if (errorInfo.getException() != null) {