From: Daniel Arndt <arndtd@ornl.gov>
Date: Mon, 7 Aug 2023 12:54:15 +0000 (-0400)
Subject: Fix compiling with PETSc with complex scalar type
X-Git-Tag: relicensing~609^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1c9b5c977e6c91c8b2318b99820e8e39c2e611a;p=dealii.git

Fix compiling with PETSc with complex scalar type
---

diff --git a/source/lac/petsc_vector_base.cc b/source/lac/petsc_vector_base.cc
index c8e0946464..df82e50bdf 100644
--- a/source/lac/petsc_vector_base.cc
+++ b/source/lac/petsc_vector_base.cc
@@ -277,8 +277,8 @@ namespace PETScWrappers
         // numbers back as integers later on, we get the same thing.
         for (PetscInt i = 0; i < end_index - ghost_start_index; i++)
           {
-            Assert(static_cast<PetscInt>(static_cast<PetscScalar>(
-                     ghost_start_index + i)) == (ghost_start_index + i),
+            Assert(static_cast<PetscInt>(std::real(static_cast<PetscScalar>(
+                     ghost_start_index + i))) == (ghost_start_index + i),
                    ExcInternalError());
             array[i] = ghost_start_index + i;
           }