1 files changed, 1 insertions, 0 deletions

diff --git a/lgc.c b/lgc.c
index cf62a45c..db519c6d 100644
--- a/lgc.c
+++ b/lgc.c
@@ -1565,6 +1565,7 @@ static void incstep (lua_State *L, global_State *g) {
 */
 void luaC_step (lua_State *L) {
   global_State *g = G(L);
+  lua_assert(!g->gcemergency);
   if (g->gcrunning) {  /* running? */
     if(isdecGCmodegen(g))
       genstep(L, g);