diff --git a/src/hb-bit-set.hh b/src/hb-bit-set.hh
index 99d1689ba..a38da130a 100644
--- a/src/hb-bit-set.hh
+++ b/src/hb-bit-set.hh
@@ -88,9 +88,7 @@ struct hb_bit_set_t
   bool resize (unsigned int count, bool clear = true)
   {
     if (unlikely (!successful)) return false;
-    pages.alloc (count, true); /* Exact allocation. */
-    page_map.alloc (count, true); /* Exact allocation. */
-    if (unlikely (!pages.resize (count, clear) || !page_map.resize (count, clear)))
+    if (unlikely (!pages.resize (count, clear, true) || !page_map.resize (count, clear, true)))
     {
       pages.resize (page_map.length);
       successful = false;
@@ -424,8 +422,7 @@ struct hb_bit_set_t
   private:
   bool allocate_compact_workspace (hb_vector_t<unsigned>& workspace)
   {
-    workspace.alloc (pages.length, true);
-    if (unlikely (!workspace.resize (pages.length)))
+    if (unlikely (!workspace.resize_exact (pages.length)))
     {
       successful = false;
       return false;
diff --git a/src/hb-cff2-interp-cs.hh b/src/hb-cff2-interp-cs.hh
index 346d4c1a7..51f360ee9 100644
--- a/src/hb-cff2-interp-cs.hh
+++ b/src/hb-cff2-interp-cs.hh
@@ -45,8 +45,7 @@ struct blend_arg_t : number_t
     numValues = numValues_;
     valueIndex = valueIndex_;
     unsigned numBlends = blends_.length;
-    deltas.alloc (numBlends, true); /* Exact-size allocation. */
-    if (unlikely (!deltas.resize (numBlends)))
+    if (unlikely (!deltas.resize_exact (numBlends)))
       return;
     for (unsigned int i = 0; i < numBlends; i++)
       deltas.arrayZ[i] = blends_.arrayZ[i];
@@ -119,8 +118,7 @@ struct cff2_cs_interp_env_t : cs_interp_env_t<ELEM, CFF2Subrs>
       region_count = varStore->varStore.get_region_index_count (get_ivs ());
       if (do_blend)
       {
-        scalars.alloc (region_count, true);
-	if (unlikely (!scalars.resize (region_count)))
+	if (unlikely (!scalars.resize_exact (region_count)))
 	  SUPER::set_error ();
 	else
 	  varStore->varStore.get_region_scalars (get_ivs (), coords, num_coords,