From e5f596afcb83abeb763a2628a025c6fd69f5fe24 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Mon, 24 Apr 2017 16:05:45 -0600
Subject: [PATCH] Avoid a warning in optimized mode.

---
 source/lac/slepc_spectral_transformation.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/lac/slepc_spectral_transformation.cc b/source/lac/slepc_spectral_transformation.cc
index e4d8503a3b..da0087a096 100644
--- a/source/lac/slepc_spectral_transformation.cc
+++ b/source/lac/slepc_spectral_transformation.cc
@@ -42,6 +42,7 @@ namespace SLEPcWrappers
     if (st!=nullptr)
       {
         const PetscErrorCode ierr = STDestroy(&st);
+        (void)ierr;
         AssertNothrow (ierr == 0, SolverBase::ExcSLEPcError(ierr));
       }
   }
-- 
2.39.5