add test and files for a p21read segfault.

like the 210e2 segfault, this one is probably related to SELECTs.

test/p21/CMakeLists.txt

@@ -126,10 +126,14 @@ INSTANCE_TEST(${mid} FAIL "AABB('z',2,.B.,1.2);"             )
 #p21read reports no errors on this one; I'm not certain whether that is right or wrong.
 #INSTANCE_TEST(${mid} FAIL "AABB(4,.BEE.,4.5);"               )
 
+SCHEMA_CMLIST(${SC_SOURCE_DIR}/test/unitary_schemas/select_segfault_2.exp)
+add_test( test_select_segfault_2 ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/p21read_sdai_select_segfault_2
+                               ${CMAKE_CURRENT_SOURCE_DIR}/select_segfault_2.stp )
+set_tests_properties( test_select_segfault_2 PROPERTIES DEPENDS build_cpp_sdai_select_segfault_2 LABELS exchange_file )
+
 # Local Variables:
 # tab-width: 8
 # mode: cmake
 # indent-tabs-mode: t
 # End:
 # ex: shiftwidth=2 tabstop=8
-

test/p21/select_segfault_2.stp

@@ -0,0 +1,14 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION((''),'2;1');
+FILE_NAME('','',(''),(''),'','','');
+FILE_SCHEMA(('select_segfault_2'));
+ENDSEC;
+DATA;
+
+#1 = drc(cdl((#2,#3)));
+#2 = dre(4.5);
+#3 = dre(2.0);
+
+ENDSEC;
+END-ISO-10303-21;

test/unitary_schemas/select_segfault_2.exp

@@ -0,0 +1,20 @@
+-- bug exposed by an AP242 file
+SCHEMA select_segfault_2;
+ENTITY drc SUBTYPE OF ( gdr ); END_ENTITY;
+
+ENTITY gdr
+    ABSTRACT SUPERTYPE OF ( ONEOF ( DRC ) )
+    SUBTYPE OF (sa);
+    base: docd;
+END_ENTITY;
+
+ENTITY sa SUPERTYPE OF (ONEOF (gdr)); END_ENTITY;
+
+TYPE docd = SELECT ( cdl, d ); END_TYPE;
+TYPE cdl = LIST[2:?] OF dre; END_TYPE;
+TYPE d = REAL; END_TYPE;
+ENTITY dre;
+    id: REAL;
+END_ENTITY;
+
+END_SCHEMA;