1 files changed, 9 insertions, 0 deletions
diff --git a/src/mongo/db/exec/projection.cpp b/src/mongo/db/exec/projection.cpp
index d83dd757366..1a094011193 100644
--- a/src/mongo/db/exec/projection.cpp
+++ b/src/mongo/db/exec/projection.cpp
@@ -72,6 +72,15 @@ namespace mongo {
         }
         else if (PlanStage::FAILURE == status) {
             *out = id;
+            // If a stage fails, it may create a status WSM to indicate why it
+            // failed, in which case 'id' is valid.  If ID is invalid, we
+            // create our own error message.
+            if (WorkingSet::INVALID_ID == id) {
+                mongoutils::str::stream ss;
+                ss << "projection stage failed to read in results from child";
+                Status status(ErrorCodes::InternalError, ss);
+                *out = WorkingSetCommon::allocateStatusMember( _ws, status);
+            }
         }
         else if (PlanStage::NEED_FETCH == status) {
             *out = id;