Index: head/contrib/jemalloc/src/jemalloc.c
===================================================================
--- head/contrib/jemalloc/src/jemalloc.c
+++ head/contrib/jemalloc/src/jemalloc.c
@@ -2299,21 +2299,6 @@
 	LOG("core.realloc.entry", "ptr: %p, size: %zu\n", ptr, size);
 
 	if (unlikely(size == 0)) {
-		if (ptr != NULL) {
-			/* realloc(ptr, 0) is equivalent to free(ptr). */
-			UTRACE(ptr, 0, 0);
-			tcache_t *tcache;
-			tsd_t *tsd = tsd_fetch();
-			if (tsd_reentrancy_level_get(tsd) == 0) {
-				tcache = tcache_get(tsd);
-			} else {
-				tcache = NULL;
-			}
-			ifree(tsd, ptr, tcache, true);
-
-			LOG("core.realloc.exit", "result: %p", NULL);
-			return NULL;
-		}
 		size = 1;
 	}