Fixes #161: ("polymorphic_allocator(memory_resource*) non-standard extension causes headache")

doc/container.qbk

@@ -1338,6 +1338,14 @@ use [*Boost.Container]? There are several reasons for that:
 
 [section:release_notes Release Notes]
 
+[section:release_notes_boost_1_75_00 Boost 1.75 Release]
+
+* New [classref boost::container::devector devector] container.
+* Fixed bugs/issues:
+   * [@https://github.com/boostorg/container/issues/157    GitHub #157: ['"Add missing include"]].
+
+[endsect]
+
 [section:release_notes_boost_1_74_00 Boost 1.74 Release]
 
 * Fixed bugs/issues:

include/boost/container/pmr/polymorphic_allocator.hpp

@@ -53,10 +53,9 @@ class polymorphic_allocator
    //! <b>Throws</b>: Nothing
    //!
    //! <b>Notes</b>: This constructor provides an implicit conversion from memory_resource*.
-   //!   Non-standard extension: if r is null m_resource is set to get_default_resource().
    polymorphic_allocator(memory_resource* r)
-      : m_resource(r ? r : ::boost::container::pmr::get_default_resource())
-   {}
+      : m_resource(r)
+   {  BOOST_ASSERT(r != 0);  }
 
    //! <b>Effects</b>: Sets m_resource to
    //!   other.resource().

test/polymorphic_allocator_test.cpp

@@ -25,9 +25,6 @@ void test_default_constructor()
 
 void test_resource_constructor()
 {
-   polymorphic_allocator<int> a(0);
-   BOOST_TEST(a.resource() == get_default_resource());
-
    derived_from_memory_resource d;
    polymorphic_allocator<int> b(&d);
    BOOST_TEST(&d == b.resource());