Improved memory clean-up [skip ci]

src/hnswbuild.c

@@ -183,6 +183,9 @@ CreateElementPages(HnswBuildState * buildstate)
 	UnlockReleaseBuffer(buf);
 
 	HnswUpdateMetaPage(index, true, buildstate->entryPoint, insertPage, forkNum);
+
+	pfree(etup);
+	pfree(ntup);
 }
 
 /*
@@ -227,6 +230,8 @@ CreateNeighborPages(HnswBuildState * buildstate)
 		GenericXLogFinish(state);
 		UnlockReleaseBuffer(buf);
 	}
+
+	pfree(ntup);
 }
 
 /*
@@ -430,6 +435,7 @@ InitBuildState(HnswBuildState * buildstate, Relation heap, Relation index, Index
 static void
 FreeBuildState(HnswBuildState * buildstate)
 {
+	pfree(buildstate->normvec);
 	MemoryContextDelete(buildstate->tmpCtx);
 }
 

src/hnswutils.c

@@ -611,7 +611,7 @@ HnswInitElement(ItemPointer heaptid, int m, double ml, int maxLevel)
 void
 HnswFreeElement(HnswElement element)
 {
-	list_free(element->heaptids);
+	list_free_deep(element->heaptids);
 	for (int lc = 0; lc <= element->level; lc++)
 		pfree(element->neighbors[lc].items);
 	pfree(element->neighbors);