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Bug 945: Don't crash if the error message is not a string.

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[ From commit c645ed7485 in ELinks
  0.11.2.GIT.  --KON ]
This commit is contained in:
Kalle Olavi Niemitalo 2007-04-15 02:20:41 +03:00 committed by Kalle Olavi Niemitalo
parent c69ee15963
commit ba1cef8db4
1 changed files with 7 additions and 1 deletions
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8
src/scripting/lua/core.c
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@ -70,7 +70,13 @@ static void handle_ref(LS, struct session *ses, int func_ref,
static int
l_alert(LS)
{
alert_lua_error((unsigned char *) lua_tostring(S, 1));
unsigned char *msg = (unsigned char *) lua_tostring(S, 1);
/* Don't crash if a script calls e.g. error(nil) or error(error). */
if (msg == NULL)
msg = "(cannot convert the error message to a string)";
alert_lua_error(msg);
return 0;
}