2 files changed, 37 insertions, 4 deletions
diff --git a/erts/emulator/hipe/hipe_bif0.c b/erts/emulator/hipe/hipe_bif0.c
index cec22b3836..28e4382835 100644
--- a/erts/emulator/hipe/hipe_bif0.c
+++ b/erts/emulator/hipe/hipe_bif0.c
@@ -174,8 +174,13 @@ static inline unsigned char *bytearray_lvalue(Eterm bin, Eterm idx)
 {
     Sint i;
     unsigned char *bytes;
+#ifndef DEBUG
+    ERTS_DECLARE_DUMMY(Uint bitoffs);
+    ERTS_DECLARE_DUMMY(Uint bitsize);
+#else
     Uint bitoffs;
     Uint bitsize;
+#endif
 
     if (is_not_binary(bin) ||
 	is_not_small(idx) ||
@@ -235,9 +240,15 @@ BIF_RETTYPE hipe_bifs_bitarray_2(BIF_ALIST_2)
 BIF_RETTYPE hipe_bifs_bitarray_update_3(BIF_ALIST_3)
 {
     unsigned char *bytes, bytemask;
-    Uint bitoffs, bitsize;
     Uint bitnr, bytenr;
     int set;
+#ifndef DEBUG
+    ERTS_DECLARE_DUMMY(Uint bitoffs);
+    ERTS_DECLARE_DUMMY(Uint bitsize);
+#else
+    Uint bitoffs;
+    Uint bitsize;
+#endif
 
     if (is_not_binary(BIF_ARG_1))
 	BIF_ERROR(BIF_P, BADARG);
@@ -267,8 +278,15 @@ BIF_RETTYPE hipe_bifs_bitarray_update_3(BIF_ALIST_3)
 BIF_RETTYPE hipe_bifs_bitarray_sub_2(BIF_ALIST_2)
 {
     unsigned char *bytes, bytemask;
-    Uint bitoffs, bitsize;
     Uint bitnr, bytenr;
+#ifndef DEBUG
+    ERTS_DECLARE_DUMMY(Uint bitoffs);
+    ERTS_DECLARE_DUMMY(Uint bitsize);
+#else
+    Uint bitoffs;
+    Uint bitsize;
+#endif
+
 
     if (is_not_binary(BIF_ARG_1))
 	BIF_ERROR(BIF_P, BADARG);
@@ -397,10 +415,15 @@ BIF_RETTYPE hipe_bifs_enter_code_2(BIF_ALIST_2)
     Uint nrbytes;
     void *bytes;
     void *address;
-    Uint bitoffs;
-    Uint bitsize;
     Eterm trampolines;
     Eterm *hp;
+#ifndef DEBUG
+    ERTS_DECLARE_DUMMY(Uint bitoffs);
+    ERTS_DECLARE_DUMMY(Uint bitsize);
+#else
+    Uint bitoffs;
+    Uint bitsize;
+#endif
 
     if (is_not_binary(BIF_ARG_1))
 	BIF_ERROR(BIF_P, BADARG);
diff --git a/erts/emulator/hipe/hipe_gc.c b/erts/emulator/hipe/hipe_gc.c
index 0199dea99e..e0575c35ff 100644
--- a/erts/emulator/hipe/hipe_gc.c
+++ b/erts/emulator/hipe/hipe_gc.c
@@ -46,9 +46,14 @@ Eterm *fullsweep_nstack(Process *p, Eterm *n_htop)
     char *src, *oh;
     Uint src_size, oh_size;
 
+    if (!p->hipe.nstack) {
+	ASSERT(!p->hipe.nsp && !p->hipe.nstend);
+	return n_htop;
+    }
     if (!nstack_walk_init_check(p))
 	return n_htop;
 
+    ASSERT(p->hipe.nsp && p->hipe.nstend);
     nsp = nstack_walk_nsp_begin(p);
     nsp_end = p->hipe.nstgraylim;
     if (nsp_end)
@@ -136,9 +141,14 @@ void gensweep_nstack(Process *p, Eterm **ptr_old_htop, Eterm **ptr_n_htop)
     char *heap;
     Uint heap_size, mature_size;
 
+    if (!p->hipe.nstack) {
+	ASSERT(!p->hipe.nsp && !p->hipe.nstend);
+	return;
+    }
     if (!nstack_walk_init_check(p))
 	return;
 
+    ASSERT(p->hipe.nsp && p->hipe.nstend);
     nsp = nstack_walk_nsp_begin(p);
     nsp_end = p->hipe.nstgraylim;
     if (nsp_end) {