message: Fix alignment issue in sparse_matmul_op_test
  The class relies on over-aligned members, but is constructed via non-aligned
  `new`.  Here we add Eigen's custom-aligned `new` operator to ensure proper
  alignment. This is a no-op in c++17.
  Fixes
diff: @@ -317,6 +317,9 @@ class SparseMatmulOpTest : public ::testing::Test {
  // bfloat16 representation of data3
  EIGEN_ALIGN_MAX float data3_bfloat16[kMaxPacketSize];
  EIGEN_ALIGN_MAX float ref[kMaxPacketSize];
  +
  + public:
  + EIGEN_MAKE_ALIGNED_OPERATOR_NEW
  };
  TEST_F(SparseMatmulOpTest, BroadcastPacketTest) {
  