Merge a14c936562 into 1f8b4a7f1a

Bumps the actions group with 1 update: [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel).


Updates `pypa/cibuildwheel` from 2.20 to 2.21
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](https://github.com/pypa/cibuildwheel/compare/v2.20...v2.21)

---
updated-dependencies:
- dependency-name: pypa/cibuildwheel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/emscripten.yaml

@@ -22,7 +22,7 @@ jobs:
         submodules: true
         fetch-depth: 0
 
-    - uses: pypa/cibuildwheel@v2.20
+    - uses: pypa/cibuildwheel@v2.21
       env:
         PYODIDE_BUILD_EXPORTS: whole_archive
       with:

include/pybind11/detail/exception_translation.h

@@ -50,17 +50,17 @@ inline void try_translate_exceptions() {
         - delegate translation to the next translator by throwing a new type of exception.
         */
 
-    bool handled = with_internals([&](internals &internals) {
+    bool handled = with_exception_translators(
-        auto &local_exception_translators = get_local_internals().registered_exception_translators;
+        [&](std::forward_list<ExceptionTranslator> &exception_translators,
-        if (detail::apply_exception_translators(local_exception_translators)) {
+            std::forward_list<ExceptionTranslator> &local_exception_translators) {
-            return true;
+            if (detail::apply_exception_translators(local_exception_translators)) {
-        }
+                return true;
-        auto &exception_translators = internals.registered_exception_translators;
+            }
-        if (detail::apply_exception_translators(exception_translators)) {
+            if (detail::apply_exception_translators(exception_translators)) {
-            return true;
+                return true;
-        }
+            }
-        return false;
+            return false;
-    });
+        });
 
     if (!handled) {
         set_error(PyExc_SystemError, "Exception escaped from default exception translator!");

include/pybind11/detail/internals.h

@@ -39,7 +39,11 @@
 #    if PY_VERSION_HEX >= 0x030C0000 || defined(_MSC_VER)
 // Version bump for Python 3.12+, before first 3.12 beta release.
 // Version bump for MSVC piggy-backed on PR #4779. See comments there.
-#        define PYBIND11_INTERNALS_VERSION 5
+#        ifdef Py_GIL_DISABLED
+#            define PYBIND11_INTERNALS_VERSION 6
+#        else
+#            define PYBIND11_INTERNALS_VERSION 5
+#        endif
 #    else
 #        define PYBIND11_INTERNALS_VERSION 4
 #    endif
@@ -177,6 +181,7 @@ static_assert(sizeof(instance_map_shard) % 64 == 0,
 struct internals {
 #ifdef Py_GIL_DISABLED
     pymutex mutex;
+    pymutex exception_translator_mutex;
 #endif
     // std::type_index -> pybind11's type information
     type_map<type_info *> registered_types_cpp;
@@ -643,6 +648,19 @@ inline auto with_internals(const F &cb) -> decltype(cb(get_internals())) {
     return cb(internals);
 }
 
+template <typename F>
+inline auto with_exception_translators(const F &cb)
+    -> decltype(cb(get_internals().registered_exception_translators,
+                   get_local_internals().registered_exception_translators)) {
+    auto &internals = get_internals();
+#ifdef Py_GIL_DISABLED
+    std::unique_lock<pymutex> lock((internals).exception_translator_mutex);
+#endif
+    auto &local_internals = get_local_internals();
+    return cb(internals.registered_exception_translators,
+              local_internals.registered_exception_translators);
+}
+
 inline std::uint64_t mix64(std::uint64_t z) {
     // David Stafford's variant 13 of the MurmurHash3 finalizer popularized
     // by the SplitMix PRNG.

include/pybind11/pybind11.h

@@ -2601,10 +2601,12 @@ void implicitly_convertible() {
 }
 
 inline void register_exception_translator(ExceptionTranslator &&translator) {
-    detail::with_internals([&](detail::internals &internals) {
+    detail::with_exception_translators(
-        internals.registered_exception_translators.push_front(
+        [&](std::forward_list<ExceptionTranslator> &exception_translators,
-            std::forward<ExceptionTranslator>(translator));
+            std::forward_list<ExceptionTranslator> &local_exception_translators) {
-    });
+            (void) local_exception_translators;
+            exception_translators.push_front(std::forward<ExceptionTranslator>(translator));
+        });
 }
 
 /**
@@ -2614,11 +2616,12 @@ inline void register_exception_translator(ExceptionTranslator &&translator) {
  * the exception.
  */
 inline void register_local_exception_translator(ExceptionTranslator &&translator) {
-    detail::with_internals([&](detail::internals &internals) {
+    detail::with_exception_translators(
-        (void) internals;
+        [&](std::forward_list<ExceptionTranslator> &exception_translators,
-        detail::get_local_internals().registered_exception_translators.push_front(
+            std::forward_list<ExceptionTranslator> &local_exception_translators) {
-            std::forward<ExceptionTranslator>(translator));
+            (void) exception_translators;
-    });
+            local_exception_translators.push_front(std::forward<ExceptionTranslator>(translator));
+        });
 }
 
 /**

tests/custom_exceptions.py

@@ -0,0 +1,10 @@
+from __future__ import annotations
+
+
+class PythonMyException7(Exception):
+    def __init__(self, message):
+        self.message = message
+        super().__init__(message)
+
+    def __str__(self):
+        return "[PythonMyException7]: " + self.message.a

tests/test_exceptions.cpp

@@ -111,6 +111,16 @@ struct PythonAlreadySetInDestructor {
     py::str s;
 };
 
+struct CustomData {
+    explicit CustomData(const std::string &a) : a(a) {}
+    std::string a;
+};
+
+struct MyException7 {
+    explicit MyException7(const CustomData &message) : message(message) {}
+    CustomData message;
+};
+
 TEST_SUBMODULE(exceptions, m) {
     m.def("throw_std_exception",
           []() { throw std::runtime_error("This exception was intentionally thrown."); });
@@ -385,4 +395,33 @@ TEST_SUBMODULE(exceptions, m) {
 
     // m.def("pass_exception_void", [](const py::exception<void>&) {}); // Does not compile.
     m.def("return_exception_void", []() { return py::exception<void>(); });
+
+    m.def("throws7", []() {
+        auto data = CustomData("abc");
+        throw MyException7(data);
+    });
+
+    py::class_<CustomData>(m, "CustomData", py::module_local())
+        .def(py::init<const std::string &>())
+        .def_readwrite("a", &CustomData::a);
+
+    PYBIND11_CONSTINIT static py::gil_safe_call_once_and_store<py::object>
+        PythonMyException7_storage;
+    PythonMyException7_storage.call_once_and_store_result([&]() {
+        auto mod = py::module_::import("custom_exceptions");
+        py::object obj = mod.attr("PythonMyException7");
+        return obj;
+    });
+
+    py::register_local_exception_translator([](std::exception_ptr p) {
+        try {
+            if (p) {
+                std::rethrow_exception(p);
+            }
+        } catch (const MyException7 &e) {
+            auto exc_type = PythonMyException7_storage.get_stored();
+            py::object exc_inst = exc_type(e.message);
+            PyErr_SetObject(PyExc_Exception, exc_inst.ptr());
+        }
+    });
 }

tests/test_exceptions.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import sys
 
 import pytest
+from custom_exceptions import PythonMyException7
 
 import env
 import pybind11_cross_module_tests as cm
@@ -195,6 +196,10 @@ def test_custom(msg):
             raise RuntimeError("Exception error: caught child from parent") from err
     assert msg(excinfo.value) == "this is a helper-defined translated exception"
 
+    with pytest.raises(PythonMyException7) as excinfo:
+        m.throws7()
+    assert msg(excinfo.value) == "[PythonMyException7]: abc"
+
 
 def test_nested_throws(capture):
     """Tests nested (e.g. C++ -> Python -> C++) exception handling"""

tools/pybind11NewTools.cmake

@@ -274,10 +274,6 @@ function(pybind11_add_module target_name)
     target_link_libraries(${target_name} PRIVATE pybind11::embed)
   endif()
 
-  if(MSVC)
-    target_link_libraries(${target_name} PRIVATE pybind11::windows_extras)
-  endif()
-
   # -fvisibility=hidden is required to allow multiple modules compiled against
   # different pybind versions to work properly, and for some features (e.g.
   # py::module_local).  We force it on everything inside the `pybind11`