gistfile1.diff

diff --git a/bin/varnishtest/vtc_http2.c b/bin/varnishtest/vtc_http2.c
index 208db11..8b942ac 100644
--- a/bin/varnishtest/vtc_http2.c
+++ b/bin/varnishtest/vtc_http2.c
@@ -490,28 +490,30 @@ receive_frame(void *priv) {
                                vtc_log(hp->vl, 4, "s%lu - stream->dependency: %u", s->id, s->dependency);
                                vtc_log(hp->vl, 4, "s%lu - stream->weight: %u", s->id, s->weight);
                        }
-                       iter = HPK_NewIter(s->hp->inctx, f->data + delta, f->size - delta);
-
-                       while (s->nhdrs < MAX_HDR) {
-                               r = HPK_DecHdr(iter, s->hdrs + s->nhdrs);
-                               if (r == hpk_err )
-                                       break;
-                               vtc_log(hp->vl, 4,
-                                               "s%lu - header: %s : %s (%d)",
-                                               s->id,
-                                               s->hdrs[s->nhdrs].key.ptr,
-                                               s->hdrs[s->nhdrs].value.ptr,
-                                               s->nhdrs);
-                               s->nhdrs++;
-                               if (r == hpk_done)
-                                       break;
-                       }
-                       //XXX document too many headers errors
-                       if (r != hpk_done)
-                               vtc_log(hp->vl, hp->fatal ? 4 : 0,
-                                               "Header decoding failed (%d)",
-                                               hp->fatal);
-                       HPK_FreeIter(iter);
+            if(f->size) {
+                iter = HPK_NewIter(s->hp->inctx, f->data + delta, f->size - delta);
+
+                while (s->nhdrs < MAX_HDR) {
+                    r = HPK_DecHdr(iter, s->hdrs + s->nhdrs);
+                    if (r == hpk_err )
+                        break;
+                    vtc_log(hp->vl, 4,
+                            "s%lu - header: %s : %s (%d)",
+                            s->id,
+                            s->hdrs[s->nhdrs].key.ptr,
+                            s->hdrs[s->nhdrs].value.ptr,
+                            s->nhdrs);
+                    s->nhdrs++;
+                    if (r == hpk_done)
+                        break;
+                }
+                //XXX document too many headers errors
+                if (r != hpk_done)
+                    vtc_log(hp->vl, hp->fatal ? 4 : 0,
+                            "Header decoding failed (%d)",
+                            hp->fatal);
+                HPK_FreeIter(iter);
+            }
                } else if (f->type == TYPE_PRIORITY) {
                        char *buf;
                        if (f->size != 5)