1 files changed, 5 insertions, 0 deletions
diff --git a/applypatch/applypatch.cpp b/applypatch/applypatch.cpp
index 7104abd67..db7530be9 100644
--- a/applypatch/applypatch.cpp
+++ b/applypatch/applypatch.cpp
@@ -630,6 +630,11 @@ static int GenerateTarget(const FileContents& source_file, const std::unique_ptr
   SHA_CTX ctx;
   SHA1_Init(&ctx);
   SinkFn sink = [&memory_sink_str, &ctx](const unsigned char* data, size_t len) {
+    if (len != 0) {
+      uint8_t digest[SHA_DIGEST_LENGTH];
+      SHA1(data, len, digest);
+      LOG(DEBUG) << "Appending " << len << " bytes data, sha1: " << short_sha1(digest);
+    }
     SHA1_Update(&ctx, data, len);
     memory_sink_str.append(reinterpret_cast<const char*>(data), len);
     return len;