diff --git a/coreutils-i18n.patch b/coreutils-i18n.patch
index d6e6c46..9bd30c6 100644
--- a/coreutils-i18n.patch
+++ b/coreutils-i18n.patch
@@ -2932,7 +2932,7 @@ diff -urNp coreutils-8.5-orig/src/sort.c coreutils-8.5/src/sort.c
  {
    size_t lo = 0;
    size_t hi = MONTHS_PER_YEAR;
-@@ -2062,11 +2390,79 @@ compare_version (char *restrict texta, s
+@@ -2062,11 +2390,80 @@ compare_version (char *restrict texta, s
    return diff;
  }
  
@@ -2969,7 +2969,8 @@ diff -urNp coreutils-8.5-orig/src/sort.c coreutils-8.5/src/sort.c
 +  memset (&state, '\0', sizeof(mbstate_t));
 +
 +  wclength = mbsrtowcs (month_wcs, pp, len + 1, &state);
-+  assert (wclength != (size_t)-1 && *pp == NULL);
++  if (wclength == (size_t)-1 || *pp != NULL)
++    error (SORT_FAILURE, 0, _("Invalid multibyte input %s."), quote(s));
 +
 +  for (i = 0; i < wclength; i++)
 +    {
diff --git a/coreutils.spec b/coreutils.spec
index 3774910..79fc848 100644
--- a/coreutils.spec
+++ b/coreutils.spec
@@ -1,7 +1,7 @@
 Summary: A set of basic GNU tools commonly used in shell scripts
 Name:    coreutils
 Version: 8.5
-Release: 7%{?dist}
+Release: 8%{?dist}
 License: GPLv3+
 Group:   System Environment/Base
 Url:     http://www.gnu.org/software/coreutils/
@@ -344,6 +344,10 @@ fi
 %{_libdir}/coreutils
 
 %changelog
+* Mon Sep 20 2010 Ondrej Vasik <ovasik@redhat.com> - 8.5-8
+- change assertion failure for invalid multibyte input
+  in sort to less confusing error message(#591352)
+
 * Wed Sep 09 2010 Ondrej Vasik <ovasik@redhat.com> - 8.5-7
 - add RELRO protection to su as well (#630017)