diff --git a/src/guf_assert.h b/src/guf_assert.h
index aab6509..f49013e 100644
--- a/src/guf_assert.h
+++ b/src/guf_assert.h
@@ -123,7 +123,7 @@ extern void guf_set_global_panic_handler(guf_panic_handler_fn panic_handler)
 extern const char *guf_err_to_str(guf_err err)
 {
     if (GUF_ARR_SIZE(guf_err_type_str) != GUF_ERR_TYPES_NUM) {
-        puts("Note: size of guf_err_type_str != GUF_ERR_TYPES_NUM");
+        fputs("libguf warning (in guf_assert.h): array size of guf_err_type_str != GUF_ERR_TYPES_NUM", stderr);
     }
 
     if (err < 0 || err >= GUF_ERR_TYPES_NUM) {
diff --git a/src/guf_dict.h b/src/guf_dict.h
index 42b2f78..bf2cacb 100755
--- a/src/guf_dict.h
+++ b/src/guf_dict.h
@@ -405,7 +405,7 @@ static void GUF_CAT(GUF_DICT_NAME, _try_grow_if_necessary)(GUF_DICT_NAME *ht, gu
             guf_err_set_or_panic(err, GUF_ERR_ALLOC_FAIL, GUF_ERR_MSG("in function dict_try_insert: New kv_indices_capacity would overflow)"));
             return;
         }  else {
-            GUF_ASSERT(new_size_bytes_test <= PTRDIFF_MAX);
+            GUF_ASSERT(new_size_bytes_test <= PTRDIFF_MAX && guf_is_pow2_size_t(new_size_bytes_test));
             new_size_bytes = (ptrdiff_t)new_size_bytes_test;
         }
         GUF_ASSERT_RELEASE(new_size_bytes > old_size_bytes);
@@ -416,7 +416,8 @@ static void GUF_CAT(GUF_DICT_NAME, _try_grow_if_necessary)(GUF_DICT_NAME *ht, gu
             guf_err_set_or_panic(err, GUF_ERR_ALLOC_FAIL, GUF_ERR_MSG("in function dict_try_insert: re-allocation failed"));
             return;
         }
-        allocator->free(ht->kv_indices, old_size_bytes, allocator->ctx);
+        // NOTE: would be more memory-efficient to free first, but that would leave the dict in an invalid state if the alloc fails.
+        allocator->free(ht->kv_indices, old_size_bytes, allocator->ctx); 
         ht->kv_indices = new_kv_indices;
         ht->kv_indices_cap = ht->kv_indices_cap * KV_META_GROWTH_FAC;;
         GUF_ASSERT(guf_is_pow2_size_t(ht->kv_indices_cap));
diff --git a/src/guf_hash.h b/src/guf_hash.h
index 97eced0..80b4f27 100644
--- a/src/guf_hash.h
+++ b/src/guf_hash.h
@@ -36,11 +36,6 @@ GUF_HASH_KWRDS uint64_t guf_hash64(const void *data, ptrdiff_t num_bytes, uint64
     }
 #endif
 
-// Calculate a mod pow2 (with pow2 being a power of two != 0)
-static inline uint32_t        guf_mod_pow2_u32(uint32_t a, uint32_t pow2)                {return a & (pow2 - 1);}
-static inline uint64_t        guf_mod_pow2_u64(uint64_t a, uint64_t pow2)                {return a & (pow2 - 1);}
-static inline guf_hash_size_t guf_mod_pow2_hash(guf_hash_size_t a, guf_hash_size_t pow2) {return a & (pow2 - 1);}
-
 #endif
 
 #if defined(GUF_HASH_IMPL) || defined(GUF_HASH_IMPL_STATIC)