Fix UBSAN implicit conversion warning in test/test_deflate_concurrency.cc.

diff --git a/test/test_deflate_concurrency.cc b/test/test_deflate_concurrency.cc
index 1297aee6446c6392e40c8893731983101cd1aeb3..1ab8de072b392df50e3b053bcf810662e490919b 100644 (file)
--- a/test/test_deflate_concurrency.cc
+++ b/test/test_deflate_concurrency.cc
@@ -55,8 +55,9 @@ private:
                 continue;
             if (m_state == State::STOPPED)
                 break;
-            for (uint8_t & i: buf)
-                i++;
+            for (size_t i = 0; i < sizeof(buf); i++) {
+                buf[i] = (uint8_t)(buf[i] + 1);
+            }
         }
     }