From: Perttu Ahola <celeron55@gmail.com>
Date: Fri, 27 Jul 2012 16:03:15 +0000 (+0300)
Subject: Handle max<min in LuaPseudoRandom::l_next()
X-Git-Url: http://81.2.79.47:8989/gitweb/?a=commitdiff_plain;h=e64feefc61e0fd104bfc40c61411b67423734924;p=zefram%2Fminetest%2Fminetest_engine.git

Handle max<min in LuaPseudoRandom::l_next()
---

diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp
index 61488abb..b8b3cb73 100644
--- a/src/scriptapi.cpp
+++ b/src/scriptapi.cpp
@@ -3928,6 +3928,10 @@ private:
 			min = luaL_checkinteger(L, 2);
 		if(!lua_isnil(L, 3))
 			max = luaL_checkinteger(L, 3);
+		if(max < min){
+			errorstream<<"PseudoRandom.next(): max="<<max<<" min="<<min<<std::endl;
+			throw LuaError(L, "PseudoRandom.next(): max < min");
+		}
 		if(max - min != 32767 && max - min > 32767/5)
 			throw LuaError(L, "PseudoRandom.next() max-min is not 32767 and is > 32768/5. This is disallowed due to the bad random distribution the implementation would otherwise make.");
 		PseudoRandom &pseudo = o->m_pseudo;