From 0cf6b89eb32b39b8d8b3baf629bd746316c80d39 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Thu, 21 May 2020 20:04:45 +0200
Subject: [PATCH] during removing the plot 'const', also delete the hash table

---
 src/frontend/postcoms.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/frontend/postcoms.c b/src/frontend/postcoms.c
index 830aaf54e..80a44fa16 100644
--- a/src/frontend/postcoms.c
+++ b/src/frontend/postcoms.c
@@ -954,7 +954,7 @@ static void killplot(struct plot *pl)
     txfree(pl); /* va: also tfree pl itself (memory leak) */
 }
 
-
+/* delete the const plot (called from com_quit) */
 void
 destroy_const_plot(void)
 {
@@ -966,6 +966,10 @@ destroy_const_plot(void)
         nv = v->v_next;
         vec_free(v);
     }
+    /* delete the hash table entry for the const plot */
+    if (pl->pl_lookup_table) {
+        nghash_free(pl->pl_lookup_table, NULL, NULL);
+    }
     wl_free(pl->pl_commands);
     if (pl->pl_ccom)    /* va: also tfree (memory leak) */
         throwaway(pl->pl_ccom);