package/lua/5.3.3/0012-fix-loop-parser.patch

   1 Expression list with four or more expressions in a 'for' loop can crash the interpreter.
   2
   3 Fetch from: https://www.lua.org/bugs.html#5.3.3-1
   4
   5 Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
   6
   7 --- a/src/lparser.c
   8 +++ b/src/lparser.c
   9 @@ -323,6 +323,8 @@
  10        luaK_nil(fs, reg, extra);
  11      }
  12    }
  13 +  if (nexps > nvars)
  14 +    ls->fs->freereg -= nexps - nvars;  /* remove extra values */
  15  }
  16
  17
  18 @@ -1160,11 +1162,8 @@
  19      int nexps;
  20      checknext(ls, '=');
  21      nexps = explist(ls, &e);
  22 -    if (nexps != nvars) {
  23 +    if (nexps != nvars)
  24        adjust_assign(ls, nvars, nexps, &e);
  25 -      if (nexps > nvars)
  26 -        ls->fs->freereg -= nexps - nvars;  /* remove extra values */
  27 -    }
  28      else {
  29        luaK_setoneret(ls->fs, &e);  /* close last expression */
  30        luaK_storevar(ls->fs, &lh->v, &e);
  31 --