[Bug default/27010] abort in abg-reader.cc:1287 when running on aarch64

["woodard at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=27010

--- Comment #9 from Ben Woodard <woodard at redhat dot com> ---
There are two distinct asserts that seem to be triggered the ones in the
previous update were triggering at:
libabigail/src/abg-reader.cc:1366

The following three are triggering at:
libabigail/src/abg-reader.cc:1387

/usr/lib64/libnss_myhostname.so.2 from systemd-libs-248.3-1.fc34.x86_64
/usr/lib64/libsystemd.so.0.31.0 from systemd-libs-248.3-1.fc34.x86_64
/usr/lib64/libudev.so.1.7.1 from systemd-libs-248.3-1.fc34.x86_64

  1348  /// Get the type declaration IR node that matches a given XML type node
ID.
  1349  ///
  1350  /// If no IR node has been built for this ID, this function builds the
  1351  /// type declaration IR node and returns it.  Subsequent invocation of
  1352  /// this function with this ID will just return that ID previously
returned.
  1353  ///
  1354  /// @param id the XML node ID to consider.
  1355  ///
  1356  /// @return the type declaration for the ID given in parameter.
  1357  type_base_sptr
  1358  read_context::build_or_get_type_decl(const string& id,
  1359                                       bool add_decl_to_scope)
  1360  {
  1361    type_base_sptr t = get_type_decl(id);
  1362  
  1363    if (!t)
  1364      {
  1365        xmlNodePtr n = get_xml_node_from_id(id);
> 1366        ABG_ASSERT(n);
  1367  
  1368        scope_decl_sptr scope;
  1369        access_specifier access = no_access;
  1370        if (add_decl_to_scope)
  1371          {
  1372            scope = get_scope_for_node(n, access);
  1373            /// In some cases, if for instance the scope of 'n' is a
  1374            /// namespace, get_scope_for_node() can trigger the building
  1375            /// of what is underneath of the namespace, if that has not
  1376            /// already been done.  So after that, the IR node for 'n'
  1377            /// might have been built; let's try to see if we are in
  1378            /// that case.  Otherwise, we'll just build the IR node for
  1379            /// 'n' ourselves.
  1380            if ((t = get_type_decl(id)))
  1381              return t;
  1382            ABG_ASSERT(scope);
  1383            push_decl(scope);
  1384          }
  1385  
  1386        t = build_type(*this, n, add_decl_to_scope);
> 1387        ABG_ASSERT(t);
  1388        if (is_member_type(t) && access != no_access)
  1389          {
  1390            ABG_ASSERT(add_decl_to_scope);
  1391            decl_base_sptr d = get_type_declaration(t);
  1392            ABG_ASSERT(d);
  1393            set_member_access_specifier(d, access);
  1394          }
  1395        map_xml_node_to_decl(n, get_type_declaration(t));
  1396  
  1397        if (add_decl_to_scope)
  1398          pop_scope_or_abort(scope);
  1399  
  1400        maybe_canonicalize_type(t, !add_decl_to_scope);
  1401      }
  1402    return t;
  1403  }

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