[gcc r13-8772] libstdc++: Fix typo in std::stacktrace::max_size [PR115063]

[Jonathan Wakely]

https://gcc.gnu.org/g:7dca716decf5a07f903610fda9457ff0422d2758

commit r13-8772-g7dca716decf5a07f903610fda9457ff0422d2758
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon May 13 16:25:13 2024 +0100

    libstdc++: Fix typo in std::stacktrace::max_size [PR115063]
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/115063
            * include/std/stacktrace (basic_stacktrace::max_size): Fix typo
            in reference to _M_alloc member.
            * testsuite/19_diagnostics/stacktrace/stacktrace.cc: Check
            max_size() compiles.
    
    (cherry picked from commit dd9677f3343ca2a4b4aab9428b8129774accac29)

Diff:
---
 libstdc++-v3/include/std/stacktrace                            |  2 +-
 libstdc++-v3/testsuite/19_diagnostics/stacktrace/stacktrace.cc | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/include/std/stacktrace b/libstdc++-v3/include/std/stacktrace
index e4ca2d6bfa99..8f09467d7512 100644
--- a/libstdc++-v3/include/std/stacktrace
+++ b/libstdc++-v3/include/std/stacktrace
@@ -483,7 +483,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       size_type
       max_size() const noexcept
-      { return _Impl::_S_max_size(_M_impl._M_alloc); }
+      { return _Impl::_S_max_size(_M_alloc); }
 
       const_reference
       operator[](size_type __n) const noexcept
diff --git a/libstdc++-v3/testsuite/19_diagnostics/stacktrace/stacktrace.cc b/libstdc++-v3/testsuite/19_diagnostics/stacktrace/stacktrace.cc
index 0a358b7b8ff7..1caa0fd35cb5 100644
--- a/libstdc++-v3/testsuite/19_diagnostics/stacktrace/stacktrace.cc
+++ b/libstdc++-v3/testsuite/19_diagnostics/stacktrace/stacktrace.cc
@@ -206,10 +206,20 @@ test_pr105031()
   s = auto(s);
 }
 
+void
+test_pr115063()
+{
+  // PR libstdc++/115063
+  // compilation error: std::basic_stracktrace::max_size()
+  std::stacktrace s;
+  VERIFY( s.max_size() != 0 );
+}
+
 int main()
 {
   test_cons();
   test_assign();
   test_swap();
   test_pr105031();
+  test_pr115063();
 }