From: Jean-Paul Pelteret <jppelteret@gmail.com>
Date: Wed, 24 Oct 2018 12:08:51 +0000 (+0200)
Subject: Add an assertion
X-Git-Tag: v9.1.0-rc1~588^2~6
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=207ba9c7e76d2f3f4b35261417207f91800ea239;p=dealii.git

Add an assertion
---

diff --git a/source/base/incremental_function.cc b/source/base/incremental_function.cc
index d65d479e9e..027424e6d9 100644
--- a/source/base/incremental_function.cc
+++ b/source/base/incremental_function.cc
@@ -36,6 +36,8 @@ namespace Functions
   IncrementalFunction<dim, RangeNumberType>::set_decrement(
     const time_type delta)
   {
+    Assert(delta >= 0.0,
+           ExcMessage("The decrement must be set to a non-negative value."));
     delta_t = delta;
   }