[master] ad1762243 NULL any filters for VRT_fail() and return(synth())

[Nils Goroll]

commit ad1762243268bbf625203f8b2fab2441d05f9d12
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Sun Apr 5 14:44:56 2020 +0200

    NULL any filters for VRT_fail() and return(synth())
    
    The synthetic response has nothing to do with the filters set for
    the original body.
    
    See next commit for implicit test

diff --git a/bin/varnishd/cache/cache_req_fsm.c b/bin/varnishd/cache/cache_req_fsm.c
index aee7140c6..7a9e7060e 100644
--- a/bin/varnishd/cache/cache_req_fsm.c
+++ b/bin/varnishd/cache/cache_req_fsm.c
@@ -256,6 +256,7 @@ cnt_vclfail(const struct worker *wrk, struct req *req)
 	req->err_reason = "VCL failed";
 	req->req_step = R_STP_SYNTH;
 	req->doclose = SC_VCL_FAILURE;
+	req->filter_list = NULL;
 	return (REQ_FSM_MORE);
 }
 
@@ -283,6 +284,7 @@ cnt_synth(struct worker *wrk, struct req *req)
 
 	Resp_Setup_Synth(req);
 
+	req->filter_list = NULL;
 	synth_body = VSB_new_auto();
 	AN(synth_body);