Re: Potential bug in Lua when hooking functions

[Peter Cawley <lua@...>]

On Mon, Jul 20, 2009 at 2:37 PM, Jonathan
Shaw<Jonathan.Shaw@microsoft.com> wrote:
> Forgive my ignorance, but how would a traditional diff be best displayed in a text only format?
As the plaintext output from the diff program would be one option:

E:\CPP\lua-5.1.4>diff -u src\lvm.c srcnew\lvm.c
--- src\lvm.c   Sun Feb  8 13:30:49 2009
+++ srcnew\lvm.c        Mon Jul 20 14:41:03 2009
@@ -387,11 +387,14 @@
     StkId ra;
     if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
         (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
+      const lu_byte saved_status = L->status;
+      L->status = 0;
       traceexec(L, pc);
       if (L->status == LUA_YIELD) {  /* did hook yield? */
         L->savedpc = pc - 1;
         return;
       }
+      L->status = saved_status;
       base = L->base;
     }
     /* warning!! several calls may realloc the stack and invalidate `ra' */