diff --git a/src/keccak.c b/src/keccak.c
index 201af68..9b06537 100644
--- a/src/keccak.c
+++ b/src/keccak.c
@@ -30,6 +30,7 @@ void KeccakF1600(void *s)
 void Keccak(ui r, ui c, const u8 *in, u64 inLen, u8 sfx, u8 *out, u64 outLen)
 {
     /*initialize*/ u8 s[200]; ui R=r/8; ui i,b=0; FOR(i,200) s[i]=0;
+    /*san-check*/ if (((r+c)!= 1600) || ((r % 8 ) != 0)) return;
     /*absorb*/ while(inLen>0) { b=(inLen<R)?inLen:R; FOR(i,b) s[i]^=in[i]; in+=b; inLen-=b; if (b==R) { KeccakF1600(s); b=0; } }
     /*pad*/ s[b]^=sfx; if((sfx&0x80)&&(b==(R-1))) KeccakF1600(s); s[R-1]^=0x80; KeccakF1600(s);
     /*squeeze*/ while(outLen>0) { b=(outLen<R)?outLen:R; FOR(i,b) out[i]=s[i]; out+=b; outLen-=b; if(outLen>0) KeccakF1600(s); }
diff --git a/src/libkore.c b/src/libkore.c
index cae519f..0965d3e 100644
--- a/src/libkore.c
+++ b/src/libkore.c
@@ -77,7 +77,7 @@ coroutine_iter_sent(struct netbuf *buf){
 		return coroutine_iter_next(obj);
 	}
 }
-const char response[] = "0\r\n\r\n";
+char response[] = "0\r\n\r\n";
 
 int coroutine_iter_next(struct co_obj *obj){
 	printf("Coroutine iter next called\n");
@@ -99,6 +99,10 @@ int coroutine_iter_next(struct co_obj *obj){
 	luaL_checktype(L,-1,LUA_TTHREAD);
 	printf("About to call resume()\n");
 	int err = lua_pcall(L,1,2,0);
+	if(err != 0){
+		printf("Call error: %d\n",err);
+		return (KORE_RESULT_ERROR);
+	}
 	printf("Done calling resume()\n");
 	if(!lua_toboolean(L,-2)){ //Runtime error
 		printf("Runtime error\n");
@@ -126,7 +130,7 @@ int coroutine_iter_next(struct co_obj *obj){
 		size_t size;
 		const char *data = luaL_checklstring(L,-1,&size);
 		struct netbuf *nb;
-		printf("Yielding data stream size %lld\n",size);
+		printf("Yielding data stream size %zu\n",size);
 		struct kore_buf *kb = kore_buf_alloc(0);
 		kore_buf_appendf(kb,"%x\r\n",size);
 		kore_buf_append(kb,data,size);
@@ -167,6 +171,7 @@ coroutine_disconnect(struct connection *c){
 The coroutine passed to this function should yield() the data to send to the
 client, then return when done.
 
+TODO: Broken and leaks memory
 http_response_co(request::userdata, co::coroutine)
 */
 int
@@ -187,6 +192,7 @@ lhttp_response_co(lua_State *L){
 	http_response(req,200,NULL,0);
 	coroutine_iter_next(obj);
 	printf("Done calling iter next\n");
+	return 0;
 }
 
 /*
@@ -438,6 +444,7 @@ lhttp_set_flags(lua_State *L){
 	struct http_request *req = luaL_checkrequest(L,-2);
 	lua_pop(L,2);
 	req->flags = flags;
+	return 0;
 }
 
 /*
@@ -448,6 +455,7 @@ lhttp_get_flags(lua_State *L){
 	struct http_request *req = luaL_checkrequest(L,-1);
 	lua_pop(L,1);
 	lua_pushnumber(L,req->flags);
+	return 1;
 }
 
 /*
diff --git a/src/libkore.h b/src/libkore.h
index 6cfd984..55279f3 100644
--- a/src/libkore.h
+++ b/src/libkore.h
@@ -5,9 +5,11 @@ struct co_obj {
 	struct connection *c;
 };
 int lhttp_response(lua_State *L);
+int lhttp_response_co(lua_State *L);
 int coroutine_iter_sent(struct netbuf *buf);
 int coroutine_iter_next(struct co_obj *obj);
 int lhttp_response_header(lua_State *L);
+int lhttp_request_header(lua_State *L);
 int lhttp_method_text(lua_State *L);
 int lhttp_request_get_path(lua_State *L);
 int lhttp_request_get_host(lua_State *L);
@@ -19,6 +21,8 @@ int lhttp_argument_get_string(lua_State *L);
 int lhttp_request_get_ip(lua_State *L);
 int lhttp_populate_cookies(lua_State *L);
 int lhttp_file_get(lua_State *L);
+int lhttp_set_flags(lua_State *L);
+int lhttp_get_flags(lua_State *L);
 int lhttp_populate_multipart_form(lua_State *L);
 int lkore_log(lua_State *L);
 void load_kore_libs(lua_State *L);