From 8234a6920c66af80ebe094405bd3fbf24d08c304 Mon Sep 17 00:00:00 2001
From: Daniel Milroy <daniel.milroy@gmail.com>
Date: Tue, 5 Nov 2024 00:36:04 -0800
Subject: [PATCH] traverser: don't prune by subplan for leaf vertices

---
 resource/traversers/dfu_impl.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/resource/traversers/dfu_impl.cpp b/resource/traversers/dfu_impl.cpp
index b6267e13c..68da9cec1 100644
--- a/resource/traversers/dfu_impl.cpp
+++ b/resource/traversers/dfu_impl.cpp
@@ -176,6 +176,11 @@ int dfu_impl_t::by_subplan (const jobmeta_t &meta,
     int saved_errno = errno;
     planner_multi_t *p = (*m_graph)[u].idata.subplans[s];
 
+    if (!p) {
+        // Subplan is null if u is a leaf.
+        rc = 0;
+        goto done;
+    }
     if (resource.user_data.empty ()) {
         // If user_data is empty, no data is available to prune with.
         rc = 0;