diff --git a/C/absmi.c b/C/absmi.c
index 73433b9f7..e7235e58f 100644
--- a/C/absmi.c
+++ b/C/absmi.c
@@ -557,11 +557,13 @@ static inline Term rbig(MP_INT *big)
 static PredEntry *
 creep_allowed(PredEntry *p, PredEntry *p0)
 {
+  if (!p0)
+    return NULL;
   if (p0 == PredMetaCall)
     return p0;
   if (!p0->ModuleOfPred && 
-      (!p->ModuleOfPred
-       ||
+      (!p ||
+       !p->ModuleOfPred ||
        p->PredFlags & StandardPredFlag))
     return NULL;
   return p;
@@ -2693,6 +2695,7 @@ Yap_absmi(int inp)
 	    Yap_op_from_opcode(PREG->opc) != Yap_opcode(_cut_e)) {
 	  GONext();
 	}
+	PP = PREG->u.p.p;
 	ASP = YREG+E_CB;
 	/* cut_e */
 	if (SREG <= ASP) {
@@ -2732,8 +2735,8 @@ Yap_absmi(int inp)
       }
       if (!(ActiveSignals & YAP_CREEP_SIGNAL)) {
 	SREG = (CELL *)RepPredProp(Yap_GetPredPropByFunc(Yap_MkFunctor(AtomRestoreRegs,2),0));
-	XREGS[0] = YREG[PREG->u.y.y];
-	PREG = NEXTOP(PREG,y);
+	XREGS[0] = YREG[PREG->u.yp.y];
+	PREG = NEXTOP(PREG,yp);
 	goto creep_either;
       }
       /* don't do debugging and friends here */
@@ -2763,8 +2766,8 @@ Yap_absmi(int inp)
 #endif	/* DEPTH_LIMIT */
 	      ENDCACHE_Y_AS_ENV();
 	    }
-	XREGS[0] = XREG(PREG->u.x.x);
-	PREG = NEXTOP(PREG,x);
+	XREGS[0] = XREG(PREG->u.xp.x);
+	PREG = NEXTOP(PREG,xp);
 	goto creep_either;
       }
       /* don't do debugging and friends here */
@@ -3106,9 +3109,9 @@ Yap_absmi(int inp)
       GONext();
       ENDOp();
 
-      Op(deallocate, e);
+      Op(deallocate, p);
       CACHE_Y_AS_ENV(YREG);
-      PREG = NEXTOP(PREG, e);
+      PREG = NEXTOP(PREG, p);
       /* other instructions do depend on S being set by deallocate
 	 :-( */
       SREG = YREG;
diff --git a/C/amasm.c b/C/amasm.c
index 4f720ca92..7c45c7bb9 100644
--- a/C/amasm.c
+++ b/C/amasm.c
@@ -517,6 +517,17 @@ a_e(op_numbers opcode, yamop *code_p, int pass_no)
   return code_p;
 }
 
+inline static yamop *
+a_p0(op_numbers opcode, yamop *code_p, int pass_no, PredEntry *p0)
+{
+  if (pass_no) {
+    code_p->opc = emit_op(opcode);
+    code_p->u.p.p = p0;
+  }
+  GONEXT(p);  
+  return code_p;
+}
+
 inline static yamop *
 a_ue(op_numbers opcode, op_numbers opcodew, yamop *code_p, int pass_no)
 {
@@ -2155,7 +2166,7 @@ a_deallocate(clause_info *clinfo, yamop *code_p, int pass_no, struct intermediat
       cip->cpc = cip->cpc->nextInst;
       code_p = a_p(_dexecute, clinfo, code_p, pass_no, cip);
     } else
-      code_p = a_e(_deallocate, code_p, pass_no);
+      code_p = a_p0(_deallocate, code_p, pass_no, cip->CurrentPred);
     clinfo->dealloc_found = TRUE;
   }
   return code_p;
@@ -3682,7 +3693,8 @@ Yap_InitComma(void)
     code_p->u.sbpp.bmap = NULL;
     GONEXT(sbpp);
     code_p->opc = emit_op(_deallocate);
-    GONEXT(e);
+    code_p->u.p.p = PredMetaCall;
+    GONEXT(p);
     code_p->opc = emit_op(_procceed);
     code_p->u.p.p =  PredMetaCall;
     GONEXT(p);
diff --git a/C/cdmgr.c b/C/cdmgr.c
index 1a5c8ab51..0582fcd78 100644
--- a/C/cdmgr.c
+++ b/C/cdmgr.c
@@ -3919,11 +3919,13 @@ ClauseInfoForCode(yamop *codeptr, CODEADDR *startp, CODEADDR *endp) {
 	*endp = (CODEADDR)cl+cl->ClSize;
 	return cl->ClPred;
       }
+    case _deallocate:
+      pc = NEXTOP(pc,p);
+      break;
     case _cut:
     case _cut_t:
     case _cut_e:
     case _allocate:
-    case _deallocate:
     case _write_void:
     case _write_list:
     case _write_l_list:
diff --git a/C/index.c b/C/index.c
index 823c3e04e..2202b6d4e 100644
--- a/C/index.c
+++ b/C/index.c
@@ -980,7 +980,6 @@ has_cut(yamop *pc)
     case _trust_fail:
     case _op_fail:
     case _allocate:
-    case _deallocate:
     case _write_void:
     case _write_list:
     case _write_l_list:
@@ -1298,7 +1297,8 @@ has_cut(yamop *pc)
       pc = NEXTOP(pc,c);
       break;
       /* instructions type p */
-   case _procceed:
+    case _deallocate:
+    case _procceed:
       pc = NEXTOP(pc,p);
       break;
       /* instructions type sc */
@@ -1479,8 +1479,10 @@ add_info(ClauseDef *clause, UInt regno)
     case _cut_e:
       clause->Tag = (CELL)NULL;
       return;
-    case _allocate:
     case _deallocate:
+      cl = NEXTOP(cl,p);
+      break;
+    case _allocate:
     case _write_void:
     case _write_list:
     case _write_l_list:
diff --git a/C/init.c b/C/init.c
index 6d1ec9719..cca200073 100644
--- a/C/init.c
+++ b/C/init.c
@@ -507,7 +507,7 @@ Yap_InitCPred(char *Name, unsigned long int Arity, CPredicate code, int flags)
     if (flags & SafePredFlag) {
       sz = (CELL)NEXTOP(NEXTOP(NEXTOP(p_code,sbpp),p),l);
     } else {
-      sz = (CELL)NEXTOP(NEXTOP(NEXTOP(NEXTOP(NEXTOP(p_code,e),sbpp),e),p),l);
+      sz = (CELL)NEXTOP(NEXTOP(NEXTOP(NEXTOP(NEXTOP(p_code,e),sbpp),p),p),l);
     }
     cl = (StaticClause *)Yap_AllocCodeSpace(sz);
     if (!cl) {
@@ -544,7 +544,8 @@ Yap_InitCPred(char *Name, unsigned long int Arity, CPredicate code, int flags)
   p_code = NEXTOP(p_code,sbpp);
   if (!(flags & SafePredFlag)) {
     p_code->opc = Yap_opcode(_deallocate);
-    p_code = NEXTOP(p_code,e);
+    p_code->u.p.p = pe;
+    p_code = NEXTOP(p_code,p);
   }
   p_code->opc = Yap_opcode(_procceed);
   p_code->u.p.p = pe;
diff --git a/C/tracer.c b/C/tracer.c
index a0496a460..3caf9af9d 100644
--- a/C/tracer.c
+++ b/C/tracer.c
@@ -164,6 +164,10 @@ low_level_trace(yap_low_level_port port, PredEntry *pred, CELL *args)
   LOCK(Yap_heap_regs->low_level_trace_lock);
   sc = Yap_heap_regs;
   vsc_count++;
+  if (vsc_count < 2473000LL)
+    return;
+  if (vsc_count == 2473801LL)
+    jmp_deb(1);
 #ifdef THREADS
   Yap_heap_regs->thread_handle[worker_id].thread_inst_count++;
 #endif  
diff --git a/H/YapOpcodes.h b/H/YapOpcodes.h
index 10debba61..92954736e 100644
--- a/H/YapOpcodes.h
+++ b/H/YapOpcodes.h
@@ -46,7 +46,7 @@
   OPCODE(call                       ,sbpp),
   OPCODE(procceed                   ,p),
   OPCODE(allocate                   ,e),
-  OPCODE(deallocate                 ,e),
+  OPCODE(deallocate                 ,p),
 #ifdef BEAM
   OPCODE(retry_eam                  ,e),
 #endif
diff --git a/H/rclause.h b/H/rclause.h
index 0407093a1..c64cd707e 100644
--- a/H/rclause.h
+++ b/H/rclause.h
@@ -149,7 +149,6 @@ restore_opcodes(yamop *pc)
     case _cut:
     case _cut_e:
     case _cut_t:
-    case _deallocate:
     case _enter_a_profiling:
     case _expand_index:
     case _index_blob:
@@ -353,6 +352,7 @@ restore_opcodes(yamop *pc)
       /* instructions type p */
     case _count_call:
     case _count_retry:
+    case _deallocate:
     case _enter_profiling:
     case _lock_lu:
     case _procceed:
diff --git a/LGPL/chr b/LGPL/chr
index ef9e506ca..293457c65 160000
--- a/LGPL/chr
+++ b/LGPL/chr
@@ -1 +1 @@
-Subproject commit ef9e506ca3befa9589b683ddd7e482411c00b759
+Subproject commit 293457c65497bf63027c24cf954e6b4965f70df3
diff --git a/library/Makefile.in b/library/Makefile.in
index 7f40ae662..e661b0713 100644
--- a/library/Makefile.in
+++ b/library/Makefile.in
@@ -79,9 +79,14 @@ MYDDAS_PROGRAMS= $(srcdir)/MYDDAS/myddas.ypp \
 	$(srcdir)/MYDDAS/myddas_util_predicates.ypp \
 	$(srcdir)/MYDDAS/myddas_prolog2sql_optimizer.ypp
 
+DIALECT_PROGRAMS= $(srcdir)/../shlib/dialect/hprolog.pl
+
+
 install: $(PROGRAMS) install_myddas
 	mkdir -p $(DESTDIR)$(SHAREDIR)/Yap
+	mkdir -p $(DESTDIR)$(SHAREDIR)/Yap/dialect
 	for p in $(PROGRAMS); do $(INSTALL_DATA) $$p $(DESTDIR)$(SHAREDIR)/Yap; done
+	for p in $(DIALECT_PROGRAMS); do $(INSTALL_DATA) $$p $(DESTDIR)$(SHAREDIR)/Yap/dialect; done
 
 install_myddas: $(MYDDAS_PROGRAMS)
 	count=`echo "$(YAP_EXTRAS)" | grep MYDDAS | wc -l`; \
diff --git a/shlib b/shlib
index 548ceefdb..9ca7abd12 160000
--- a/shlib
+++ b/shlib
@@ -1 +1 @@
-Subproject commit 548ceefdbbeb2bdc8bcc2abbc49a8cf5a557c238
+Subproject commit 9ca7abd128989d971a265c856bea3e1770812664