X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/7f82318f57074c2f42280e048aeac9a84b95bec9..ed375bd341a1d52ffd27a3245980bcb970b10848:/tree234.c

diff --git a/tree234.c b/tree234.c
index 9699120..4b3151e 100644
--- a/tree234.c
+++ b/tree234.c
@@ -1160,7 +1160,7 @@ tree234 *join234r(tree234 *t1, tree234 *t2) {
  * in t.
  */
 static node234 *split234_internal(tree234 *t, int index) {
-    node234 *halves[2], *n, *sib, *sub;
+    node234 *halves[2] = { NULL, NULL }, *n, *sib, *sub;
     node234 *lparent, *rparent;
     int ki, pki, i, half, lcount, rcount;
 
@@ -1182,6 +1182,7 @@ static node234 *split234_internal(tree234 *t, int index) {
     /*
      * Search down the tree to find the split point.
      */
+    halves[0] = halves[1] = NULL;
     lparent = rparent = NULL;
     pki = -1;
     while (n) {
@@ -1273,6 +1274,8 @@ static node234 *split234_internal(tree234 *t, int index) {
      */
     LOG(("  fell off bottom, lroot is %p, rroot is %p\n",
 	 halves[0], halves[1]));
+    assert(halves[0] != NULL);
+    assert(halves[1] != NULL);
     lparent->counts[pki] = rparent->counts[0] = 0;
     lparent->kids[pki] = rparent->kids[0] = NULL;
 
@@ -1475,6 +1478,7 @@ tree234 *copytree234(tree234 *t, copyfn234 copyfn, void *copyfnstate) {
  * if not.)
  */
 
+#include <string.h>
 #include <stdarg.h>
 
 #define srealloc realloc