From: Martin Kronbichler <martin.kronbichler@uni-a.de>
Date: Mon, 23 May 2022 18:35:47 +0000 (+0200)
Subject: Fix bug in FEEvaluation without vectorization
X-Git-Tag: v9.4.0-rc1~165^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13797%2Fhead;p=dealii.git

Fix bug in FEEvaluation without vectorization
---

diff --git a/include/deal.II/matrix_free/evaluation_kernels.h b/include/deal.II/matrix_free/evaluation_kernels.h
index 7958f5bf11..886a8d7b62 100644
--- a/include/deal.II/matrix_free/evaluation_kernels.h
+++ b/include/deal.II/matrix_free/evaluation_kernels.h
@@ -4769,8 +4769,12 @@ namespace internal
                orientation[v][i];
     };
 
+    const unsigned int cell_index =
+      dof_access_index == MatrixFreeFunctions::DoFInfo::dof_access_cell ?
+        fe_eval.get_cell_ids()[0] :
+        cell * n_lanes;
     const unsigned int *dof_indices =
-      &dof_info.dof_indices_contiguous[dof_access_index][cell * n_lanes];
+      &dof_info.dof_indices_contiguous[dof_access_index][cell_index];
 
     for (unsigned int comp = 0; comp < n_components; ++comp)
       {