From 7f5a59f77ab753b4e564e9e288fb6e43665d3778 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 18 Apr 2017 16:38:49 -0600
Subject: [PATCH] Avoid a warning in release mode.

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

diff --git a/source/lac/slepc_solver.cc b/source/lac/slepc_solver.cc
index ea91456bce..e7f434c5f2 100644
--- a/source/lac/slepc_solver.cc
+++ b/source/lac/slepc_solver.cc
@@ -68,6 +68,7 @@ namespace SLEPcWrappers
 #else
         const PetscErrorCode ierr = EPSDestroy (&eps);
 #endif
+        (void)ierr;
         AssertNothrow (ierr == 0, ExcSLEPcError(ierr));
       }
   }
-- 
2.39.5