Add one patch for Lua 5.5.0

Author: fperrad

hererocks.py

@@ -2000,6 +2000,18 @@ class RioLua(Lua):
                } while (testnext(ls, ',') || testnext(ls, ';'));
                check_match(ls, '}', '{', line);
                lastlistfield(fs, &cc);
+        """,
+        "Arithmetic overflow in 'collectgarbage\"step\"'": """
+            lapi.c:
+            @@ -1205,6 +1205,8 @@ LUA_API int lua_gc (lua_State *L, int what, ...) {
+                   g->gcstp = 0;  /* allow GC to run (other bits must be zero here) */
+                   if (n <= 0)
+                     n = g->GCdebt;  /* force to run one basic step */
+            +      else if (g->GCdebt < n - MAX_LMEM)  /* overflow? */
+            +        n = MAX_LMEM + g->GCdebt;  /* trim 'n' (debt must be negative) */
+                   luaE_setdebt(g, g->GCdebt - n);
+                   luaC_condGC(L, (void)0, work = 1);
+                   if (work && g->gcstate == GCSpause)  /* end of cycle? */
         """
     }
     patches_per_version = {
@@ -2077,6 +2089,11 @@ class RioLua(Lua):
                 "Constructors with nils can overflow counters during parsing"
             ]
         },
+        "5.5": {
+            "0": [
+                "Arithmetic overflow in 'collectgarbage\"step\"'"
+            ]
+        },
     }
 
     def __init__(self, version):