--- a/libinterp/parse-tree/pt-eval.cc	Tue Aug 08 11:55:59 2017 -0700
+++ b/libinterp/parse-tree/pt-eval.cc	Tue Aug 08 18:18:01 2017 -0400
@@ -1370,9 +1370,11 @@
                     // Silently ignore extra output values.
 
                     octave_value_list tmp_list
-                      = base_expr_val.subsref (type.substr (beg, i-beg), idx, nargout);
-
-                    partial_expr_val = tmp_list.length () ? tmp_list(0) : octave_value ();
+                      = base_expr_val.subsref (type.substr (beg, i-beg),
+                                               idx, nargout);
+
+                    partial_expr_val
+                      = tmp_list.length () ? tmp_list(0) : octave_value ();
 
                     if (! indexing_object)
                       {
@@ -1435,23 +1437,50 @@
         p_dyn_field++;
       }
 
-    if (! idx.empty () && (! base_expr_val.is_function ()
-                           || base_expr_val.is_classdef_meta ()))
+
+    // If ! idx.empty () that means we still have stuff to index otherwise
+    // they would have been dealt with and idx would have been emptied.
+    if (! idx.empty ())
       {
-        try
+        // This is for +package and other classdef_meta objects
+        if (! base_expr_val.is_function ()
+              || base_expr_val.is_classdef_meta ())
           {
-            retval = base_expr_val.subsref (type.substr (beg, n-beg), idx, nargout);
-
-            beg = n;
-            idx.clear ();
+            try
+              {
+                retval = base_expr_val.subsref (type.substr (beg, n-beg),
+                                                idx, nargout);
+              }
+            catch (octave::index_exception& e)
+              {
+                final_index_error (e, expr);
+              }
           }
-        catch (index_exception& e)  // range problems, bad index type, etc.
+        else
           {
-            final_index_error (e, expr);
+            // FIXME: we want this to only be a superclass constructor
+            // call Should we actually make a check for this or are all
+            // other types of calls already dealt with?
+
+            octave_function *fcn = base_expr_val.function_value ();
+
+            if (fcn)
+              {
+                try
+                  {
+                    retval = fcn->call (*this, nargout, idx);
+                  }
+                catch (octave::index_exception& e)
+                  {
+                    final_index_error (e, expr);
+                  }
+              }
           }
       }
 
-    // This happens if... ??
+    // FIXME: when can the following happen?  In what case does indexing
+    // result in a value that is a function?  Classdef method calls?
+    // Something else?
 
     octave_value val = (retval.length () ? retval(0) : octave_value ());
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/bug-51534/bug-51534.tst	Tue Aug 08 18:18:01 2017 -0400
@@ -0,0 +1,21 @@
+## Copyright (C) 2017 Piotr Held
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or
+## (at your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+%!test
+%! a = child_bug51534 ('asd');
+%! assert (strcmp (a.prop, 'asd'));

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/bug-51534/child_bug51534.m	Tue Aug 08 18:18:01 2017 -0400
@@ -0,0 +1,7 @@
+classdef child_bug51534 < parent_bug51534
+  methods
+    function self = child_bug51534 (val)
+      self@parent_bug51534 (val);
+    endfunction
+  endmethods
+endclassdef

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/bug-51534/module.mk	Tue Aug 08 18:18:01 2017 -0400
@@ -0,0 +1,6 @@
+bug_51534_TEST_FILES = \
+  %reldir%/bug-51534.tst \
+  %reldir%/parent_bug51534.m \
+  %reldir%/child_bug51534.m
+
+TEST_FILES += $(bug_51534_TEST_FILES)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/bug-51534/parent_bug51534.m	Tue Aug 08 18:18:01 2017 -0400
@@ -0,0 +1,10 @@
+classdef parent_bug51534 < handle
+  properties
+    prop
+  endproperties
+  methods
+    function self = parent_bug51534 (val)
+      self.prop = val;
+    endfunction
+  endmethods
+endclassdef

--- a/test/module.mk	Tue Aug 08 11:55:59 2017 -0700
+++ b/test/module.mk	Tue Aug 08 18:18:01 2017 -0400
@@ -58,6 +58,7 @@
 include %reldir%/bug-50716/module.mk
 include %reldir%/bug-51192/module.mk
 include %reldir%/bug-51532/module.mk
+include %reldir%/bug-51534/module.mk
 include %reldir%/bug-51599/module.mk
 include %reldir%/class-concat/module.mk
 include %reldir%/classdef/module.mk