diff --git a/bigstuff.cpp b/bigstuff.cpp
index a9b0284e..53cbd52b 100644
--- a/bigstuff.cpp
+++ b/bigstuff.cpp
@@ -123,7 +123,7 @@ bool grailWasFound(cell *c) {
 void generateAlts(heptagon *h, int levs, bool link_cdata) {
   if(!h->alt) return;
   preventbarriers(h->c7);
-  forCellEx(c2, h->c7) preventbarriers(c2);
+  if(h->c7) forCellEx(c2, h->c7) preventbarriers(c2);
   if(GOLDBERG)
     for(int i=0; i<S7; i++) preventbarriers(createStep(h, i)->c7);
   for(int i=0; i<S7; i++) 
diff --git a/irregular.cpp b/irregular.cpp
index 8a3a4a04..88d7fd21 100644
--- a/irregular.cpp
+++ b/irregular.cpp
@@ -1015,6 +1015,14 @@ int readArgs() {
     PHASE(2);
     shift_arg_formula(density);
     }
+  else if(argis("-irrb")) {
+    PHASE(2);
+    shift(); bitruncations_requested = argi();
+    }
+  else if(argis("-irrq")) {
+    PHASE(2);
+    shift_arg_formula(quality);
+    }
   else if(argis("-irrload")) {
     PHASE(3);
     restart_game();
diff --git a/quotient.cpp b/quotient.cpp
index 66b3fc8b..464378df 100644
--- a/quotient.cpp
+++ b/quotient.cpp
@@ -334,6 +334,7 @@ struct hrmap_quotient : hrmap {
         h->rval0 = h->rval1 = 0; h->cdata = NULL;
         h->distance = 0;
         if(!IRREGULAR) h->c7 = newCell(S7, h);
+        else h->c7 = NULL;
         }
       for(int j=0; j<S7; j++) {
         int co = connections[i*S7+j];