From 61e2ba76c40f5871196d071eebdf8d2c81a73fba Mon Sep 17 00:00:00 2001
From: "Ralf W. Grosse-Kunstleve" <rwgk@google.com>
Date: Fri, 7 May 2021 15:00:55 -0700
Subject: [PATCH] Minor iwyu fix, additional comment.

---
 include/pybind11/detail/init.h     | 1 +
 tests/test_pickling_trampoline.cpp | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/pybind11/detail/init.h b/include/pybind11/detail/init.h
index c6b45a8c384..3269e04254a 100644
--- a/include/pybind11/detail/init.h
+++ b/include/pybind11/detail/init.h
@@ -296,6 +296,7 @@ void setstate(value_and_holder &v_h, std::pair<T, O> &&result, bool need_alias)
     auto d = handle(result.second);
     if (PyDict_Check(d.ptr()) && PyDict_Size(d.ptr()) == 0) {
         // Skipping setattr below, to not force use of py::dynamic_attr() for Class unnecessarily.
+        // See PR #2972 for details.
         return;
     }
     setattr((PyObject *) v_h.inst, "__dict__", d);
diff --git a/tests/test_pickling_trampoline.cpp b/tests/test_pickling_trampoline.cpp
index e5bd29be58e..b02a9a99171 100644
--- a/tests/test_pickling_trampoline.cpp
+++ b/tests/test_pickling_trampoline.cpp
@@ -5,6 +5,7 @@
 #include "pybind11_tests.h"
 
 #include <memory>
+#include <stdexcept>
 #include <utility>
 
 namespace {