:art: Check for NULL in UsrUgenTick

diff --git a/src/lib/modules.c b/src/lib/modules.c
index 5c75eaa1f0777fe09e9fac79b825fce7ef060ebe..ff897dfa4bf6966d4b1a7e4e3c69eb37a51f0822 100644 (file)
--- a/src/lib/modules.c
+++ b/src/lib/modules.c
@@ -248,6 +248,8 @@ static INSTR(UsrUGenTick) {
   const m_uint offset = !instr->m_val ? SZ_INT : 0;
   shred->reg -= SZ_INT*2 - offset;
   const M_Object o = *(M_Object*)(shred->reg + SZ_INT - offset);
+  if(!o)
+    Except(shred, "[NullPtrException]");
   struct UUGen_ *uu = UGEN(o)->module.gen.data;
   if(uu->shred)
     free_vm_shred(uu->shred);