Mercurial > hg > ucx / file diff

--- a/src/mempool.c	Sun Jun 15 18:40:31 2025 +0200
+++ b/src/mempool.c	Sat Jul 19 21:09:07 2025 +0200
@@ -633,13 +633,19 @@
     new_source_allocator->data = source;
 
     // transfer all the data
-    memcpy(&dest->data[dest->size], source->data, sizeof(void*)*source->size);
-    dest->size += source->size;
+    if (source->size > 0) {
+        memcpy(&dest->data[dest->size], source->data,
+            sizeof(void*)*source->size);
+        dest->size += source->size;
+    }
 
     // transfer all registered memory
-    memcpy(&dest->registered[dest->registered_size], source->registered,
-           sizeof(struct cx_mempool_foreign_memory_s) * source->size);
-    dest->registered_size += source->registered_size;
+    if (source->registered_size > 0) {
+        memcpy(&dest->registered[dest->registered_size], source->registered,
+               sizeof(struct cx_mempool_foreign_memory_s)
+               * source->registered_size);
+        dest->registered_size += source->registered_size;
+    }
 
     // register the old allocator with the new pool
     // we have to remove const-ness for this, but that's okay here