--- a/libinterp/corefcn/help.cc	Wed May 16 22:03:10 2018 -0700
+++ b/libinterp/corefcn/help.cc	Thu May 17 11:55:18 2018 -0700
@@ -488,16 +488,16 @@
 
     octave_user_code *curr_fcn = cs.caller_user_code ();
 
-    if (! curr_fcn)
-      return retval;
-
     // All subfunctions are listed in the top-level function of this file.
-    while (curr_fcn->is_subfunction ())
+    while (curr_fcn && curr_fcn->is_subfunction ())
       {
         symbol_scope pscope = curr_fcn->parent_fcn_scope ();
         curr_fcn = pscope.function ();
       }
 
+    if (! curr_fcn)
+      return retval;
+
     // Get subfunctions.
     const std::list<std::string> names = curr_fcn->subfunction_names ();
 

--- a/libinterp/corefcn/time.cc	Wed May 16 22:03:10 2018 -0700
+++ b/libinterp/corefcn/time.cc	Thu May 17 11:55:18 2018 -0700
@@ -108,8 +108,8 @@
 @deftypefn {} {@var{seconds} =} time ()
 Return the current time as the number of seconds since the epoch.
 
-The epoch is referenced to 00:00:00 CUT (Coordinated Universal Time) 1 Jan
-1970.  For example, on Monday February 17, 1997 at 07:15:06 CUT, the value
+The epoch is referenced to 00:00:00 UTC (Coordinated Universal Time) 1 Jan
+1970.  For example, on Monday February 17, 1997 at 07:15:06 UTC, the value
 returned by @code{time} was 856163706.
 @seealso{strftime, strptime, localtime, gmtime, mktime, now, date, clock, datenum, datestr, datevec, calendar, weekday}
 @end deftypefn */)
@@ -130,7 +130,7 @@
        doc: /* -*- texinfo -*-
 @deftypefn {} {@var{tm_struct} =} gmtime (@var{t})
 Given a value returned from @code{time}, or any non-negative integer,
-return a time structure corresponding to CUT (Coordinated Universal Time).
+return a time structure corresponding to UTC (Coordinated Universal Time).
 
 For example: