From 3e965ac9b327c46abca62320e221dbdaf1631239 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Sat, 5 May 2018 23:27:55 -0400
Subject: Back-off on Hash asserts (GH #652) The asserts were a little
 aggressive and caused very noisy Debug runs. The library itself was one of
 the biggest offenders.

---
 blake2.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/blake2.cpp b/blake2.cpp
index e858f8c7..1af13fdb 100644
--- a/blake2.cpp
+++ b/blake2.cpp
@@ -356,7 +356,7 @@ void BLAKE2_Base<W, T_64bit>::Restart(const BLAKE2_ParameterBlock<T_64bit>& bloc
 template <class W, bool T_64bit>
 void BLAKE2_Base<W, T_64bit>::Update(const byte *input, size_t length)
 {
-    CRYPTOPP_ASSERT(input != NULLPTR);
+    CRYPTOPP_ASSERT(!(input == NULLPTR && length != 0));
     if (length == 0) { return; }
 
     State& state = *m_state.data();
-- 
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