Export of internal Abseil changes

--
4c6405d1be98fc669b5167970783da00c6a43b86 by Derek Mauro <dmauro@google.com>:

Turn off -Warray-bounds for GCC in internal/inlined_vector.h
GCC 11 appears to erroneously warn here

PiperOrigin-RevId: 374709739

--
be9909b010b3da5967ab0ff44a09be034a1fa82f by Derek Mauro <dmauro@google.com>:

Add non-templated operator new and new[] to ThrowingValue.
GCC 11 is confused and issues -Wmismatched-new-delete.

PiperOrigin-RevId: 374648084

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a30a87bf1498aff26bcd751daec120d14a934d99 by Derek Mauro <dmauro@google.com>:

Simplify ThrowingAllocator::select_on_container_copy_construction
to workaround what may be a clang c++20 bug

PiperOrigin-RevId: 374630576
GitOrigin-RevId: 4c6405d1be98fc669b5167970783da00c6a43b86
Change-Id: I48f1091c4a0f262961d9059dac4e6b44a82ae91d

absl/base/internal/exception_safety_testing.h

@@ -536,7 +536,22 @@ class ThrowingValue : private exceptions_internal::TrackedObject {
   }
 
   // Memory management operators
-  // Args.. allows us to overload regular and placement new in one shot
+  static void* operator new(size_t s) noexcept(
+      IsSpecified(TypeSpec::kNoThrowNew)) {
+    if (!IsSpecified(TypeSpec::kNoThrowNew)) {
+      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION, true);
+    }
+    return ::operator new(s);
+  }
+
+  static void* operator new[](size_t s) noexcept(
+      IsSpecified(TypeSpec::kNoThrowNew)) {
+    if (!IsSpecified(TypeSpec::kNoThrowNew)) {
+      exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION, true);
+    }
+    return ::operator new[](s);
+  }
+
   template <typename... Args>
   static void* operator new(size_t s, Args&&... args) noexcept(
       IsSpecified(TypeSpec::kNoThrowNew)) {
@@ -557,12 +572,6 @@ class ThrowingValue : private exceptions_internal::TrackedObject {
 
   // Abseil doesn't support throwing overloaded operator delete.  These are
   // provided so a throwing operator-new can clean up after itself.
-  //
-  // We provide both regular and templated operator delete because if only the
-  // templated version is provided as we did with operator new, the compiler has
-  // no way of knowing which overload of operator delete to call. See
-  // https://en.cppreference.com/w/cpp/memory/new/operator_delete and
-  // https://en.cppreference.com/w/cpp/language/delete for the gory details.
   void operator delete(void* p) noexcept { ::operator delete(p); }
 
   template <typename... Args>
@@ -726,9 +735,8 @@ class ThrowingAllocator : private exceptions_internal::TrackedObject {
 
   ThrowingAllocator select_on_container_copy_construction() noexcept(
       IsSpecified(AllocSpec::kNoThrowAllocate)) {
-    auto& out = *this;
     ReadStateAndMaybeThrow(ABSL_PRETTY_FUNCTION);
-    return out;
+    return *this;
   }
 
   template <typename U>

absl/container/internal/inlined_vector.h

@@ -36,6 +36,7 @@ namespace inlined_vector_internal {
 // GCC does not deal very well with the below code
 #if !defined(__clang__) && defined(__GNUC__)
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
 #endif
 
@@ -955,7 +956,7 @@ auto Storage<T, N, A>::Swap(Storage* other_storage_ptr) -> void {
   swap(*GetAllocPtr(), *other_storage_ptr->GetAllocPtr());
 }
 
-// End ignore "maybe-uninitialized"
+// End ignore "array-bounds" and "maybe-uninitialized"
 #if !defined(__clang__) && defined(__GNUC__)
 #pragma GCC diagnostic pop
 #endif