[gcc r13-8473] Daily bump.

[gcc r13-8473] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:d3c8deb75efbe09ab64f8ab8b685bafb7d7e7180

commit r13-8473-gd3c8deb75efbe09ab64f8ab8b685bafb7d7e7180
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Thu Mar 21 00:22:50 2024 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP          |  2 +-
 libstdc++-v3/ChangeLog | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index 75de3250ecd..95c7d7a00c2 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20240320
+20240321
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 0a3af670ff3..2550e45e126 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,28 @@
+2024-03-20  François Dumont  <fdumont@gcc.gnu.org>
+
+	* include/std/iterator (__cpp_lib_null_iterators): Define regardless of
+	_GLIBCXX_DEBUG.
+	* include/std/version (__cpp_lib_null_iterators): Likewise.
+
+2024-03-20  François Dumont  <fdumont@gcc.gnu.org>
+
+	Backported from master:
+	2024-03-18  François Dumont  <fdumont@gcc.gnu.org>
+
+	* include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_can_advance):
+	Accept 0 offset advance on value-initialized iterator.
+	* testsuite/23_containers/vector/debug/n3644.cc: New test case.
+
+2024-03-20  François Dumont  <fdumont@gcc.gnu.org>
+
+	Backported from master:
+	2024-03-18  François Dumont  <fdumont@gcc.gnu.org>
+
+	* include/debug/safe_local_iterator.tcc
+	(_Safe_local_iterator::_M_valid_range): Add _M_value_initialized and
+	_M_singular checks.
+	* testsuite/23_containers/unordered_set/debug/114316.cc: New test case.
+
 2024-03-18  Jonathan Wakely  <jwakely@redhat.com>
 
 	Backported from master: