test_pos_map/reset_nonempty no longer triggers an assertion

Disabled warnings-as-errors for examples that use Boost.Context

close #403

example/Jamfile

@@ -71,7 +71,10 @@ run_example deletes : 2_simple/deletes.cpp
 run_example callbacks : 2_simple/callbacks.cpp
     : $(regular_args) ;
 run_example coroutines_cpp11 : 2_simple/coroutines_cpp11.cpp /boost/mysql/test//boost_context_lib
-    : $(regular_args) ;
+    : $(regular_args) : :
+    # TODO: remove when https://github.com/boostorg/context/issues/284 is fixed
+    <warnings-as-errors>off
+;
 run_example batch_inserts : 2_simple/batch_inserts.cpp /boost/mysql/test//boost_json_lib
     : $(hostname) : run_batch_inserts.py ;
 run_example batch_inserts_generic : 2_simple/batch_inserts_generic.cpp /boost/mysql/test//boost_json_lib
@@ -119,4 +122,6 @@ run_example connection_pool :
         # Uses heavily Boost.Context coroutines, which aren't fully supported by asan
         <address-sanitizer>norecover:<build>no
         <address-sanitizer>enable:<build>no
+        # TODO: remove when https://github.com/boostorg/context/issues/284 is fixed
+        <warnings-as-errors>off
     ;

test/unit/test/detail/typing/pos_map.cpp

@@ -28,7 +28,7 @@ using boost::mysql::detail::pos_absent;
 using boost::mysql::detail::pos_map_add_field;
 using boost::mysql::detail::pos_map_reset;
 
-BOOST_AUTO_TEST_SUITE(test_post_map)
+BOOST_AUTO_TEST_SUITE(test_pos_map)
 
 BOOST_AUTO_TEST_CASE(reset_empty)
 {
@@ -47,7 +47,7 @@ BOOST_AUTO_TEST_CASE(reset_nonempty)
     BOOST_TEST(map[0] == pos_absent);
     BOOST_TEST(map[1] == pos_absent);
     BOOST_TEST(map[2] == pos_absent);
-    BOOST_TEST(map[3] == 45u);  // didn't modify any extra storage
+    BOOST_TEST(storage[3] == 45u);  // didn't modify any extra storage
 }
 
 BOOST_AUTO_TEST_CASE(add_field_empty)