coverage: fellow_cache_obj_slim()

src/fellow_cache.c

@@ -5506,11 +5506,13 @@ static void test_fellow_cache_obj_iter_final(
 {
 	struct fellow_cache_res fcr;
 	struct fellow_cache_obj *fco;
+	struct fellow_cache_seg *fcs;
 	unsigned char h2[SHA256_LEN];
 	struct objcore *toc, ocmem[1];
 	VSHA256_CTX sha256ctx;
 	uintptr_t priv2;
 	unsigned u, refcnt;
+	struct fcscursor c;
 	int injcount;
 
 	INIT_OBJ(ocmem, OBJCORE_MAGIC);
@@ -5532,6 +5534,16 @@ static void test_fellow_cache_obj_iter_final(
 	if (injcount == 0)
 		return;
 
+	fcsc_init(&c, &(*fcop)->seglist);
+	if ((fcs = FCSC_NEXT(&c)) != NULL) {
+		while (fcs->state == FCS_READING || fcs->state == FCS_WRITING)
+			usleep(100);
+		assert(fcs->state == FCS_INCORE);
+		AZ(fcs->refcnt);
+	} else
+		WRONG("no seg");
+	fellow_cache_obj_slim(fc, *fcop);
+
 	// remember object and deref
 	priv2 = (*fcop)->fdb.fdb;
 	refcnt = FCO_REFCNT(*fcop);