fellow_storage: Clarify error handling for _getspace()

src/fellow_storage.c

@@ -969,7 +969,14 @@ sfemem_getspace(struct worker *wrk, struct objcore *oc, ssize_t *ssz,
   out:
 #endif
 	if (fcr.status != fcr_ok) {
-		VSLb(wrk->vsl, SLT_Error, "GetSpace: %s",
+		/*
+		 * XXX can not fail the oc here:
+		 * Assert error in vbf_fetch_thread(), cache/cache_fetch.c line 1124:
+		 *   Condition((oc->flags & OC_F_FAILED) == 0) not true.
+		 */
+		//XXX oc_fcr_handle(wrk, oc, fcr);
+		VSLb(wrk->vsl, SLT_Error, "fellow %s: %s",
+		    fellow_cache_res_s[fcr.status],
 		    fcr.r.err ? fcr.r.err : "Unknown error");
 		*ssz = -1;
 		return (0);

src/vtc/fellow_coverage.vtc

@@ -43,6 +43,13 @@ varnish v1 -vcl+backend {
 	}
 }
 
+logexpect l1 -v v1 -g vxid -q {BereqURL ~ "^/256k.1"} {
+	fail add * End
+	expect * * Error	"objsize_max reached"
+	expect 0 = FetchError	"Could not get storage"
+	fail clear
+} -start
+
 client c1 {
 	txreq -url "/256k"
 	rxresp
@@ -70,6 +77,7 @@ client c2 {
 client c1 -wait
 client c2 -wait
 server s1 -wait
+logexpect l1 -wait
 
 server s1 {
 	rxreq