From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 29 Oct 2024 02:17:22 +0000 (-0600)
Subject: Skip an assert for posix_memalign if size==0.
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F17814%2Fhead;p=dealii.git

Skip an assert for posix_memalign if size==0.

POSIX says that the returned pointer can be a nullptr if the size requested is
zero. So skip the assertion if size==0.
---

diff --git a/source/base/utilities.cc b/source/base/utilities.cc
index 4485574b33..c193f201f7 100644
--- a/source/base/utilities.cc
+++ b/source/base/utilities.cc
@@ -1047,7 +1047,8 @@ namespace Utilities
       const int ierr = ::posix_memalign(memptr, alignment, size);
 
       AssertThrow(ierr == 0, ExcOutOfMemory(size));
-      AssertThrow(*memptr != nullptr, ExcOutOfMemory(size));
+      if (size > 0)
+        AssertThrow(*memptr != nullptr, ExcOutOfMemory(size));
 #else
       // Windows does not appear to have posix_memalign. just use the
       // regular malloc in that case