From 7dfbfbda796c073d1019ade6a4fac176038e8958 Mon Sep 17 00:00:00 2001
From: Bart van Strien <bart.bes+projects@gmail.com>
Date: Sat, 9 Sep 2017 13:23:49 +0200
Subject: [PATCH] Error if ParticleSystem's particle lifetime is set to a
 negative value (resolves #1339)

--HG--
branch : minor
---
 src/modules/graphics/wrap_ParticleSystem.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/modules/graphics/wrap_ParticleSystem.cpp b/src/modules/graphics/wrap_ParticleSystem.cpp
index 2be508c1b..8724a387d 100644
--- a/src/modules/graphics/wrap_ParticleSystem.cpp
+++ b/src/modules/graphics/wrap_ParticleSystem.cpp
@@ -151,6 +151,10 @@ int w_ParticleSystem_setParticleLifetime(lua_State *L)
 	ParticleSystem *t = luax_checkparticlesystem(L, 1);
 	float arg1 = (float)luaL_checknumber(L, 2);
 	float arg2 = (float)luaL_optnumber(L, 3, arg1);
+
+	if (arg1 < 0.0f || arg2 < 0.0f)
+		return luaL_error(L, "Invalid particle lifetime (must be >= 0)");
+
 	t->setParticleLifetime(arg1, arg2);
 	return 0;
 }