Oracle Bug 15028407 - SUNBT4344557 setting XmNpacking resource of XmRowColumn
   widget causes core dump

What happens is that when _XtAppInit is called it saves a backup of the
argv_in_out value passed into it.  The backup value is initially created with
space for the arguments, and one extra item so that the list may be NULL
terminated.

The argv_in_out list is then traversed and all values are copied before
finally NULL terminating the list.

At the end of the function, the argv_in_out value is in theory restored to
its original value, albeit with the contents in a new memory location(safe
from being freed by the shell or anyone else).  In this case, it has been
given a value that it didn't have in the first place.

When a NULL value is passed in to _XtAppInit, memory is allocated for one
item which is NULL.  The address of this memory is saved back to the
argv_in_out value instead of NULL.  Subsequent functions see a real value
instead of NULL and it is this value that is stored in the XtNargv resource
of the shell.  

When the value of XtNargv is retrieved it is not-null, but its value doesn't
make sense.

Need to evaluate for submission upstream.

--- a/src/Display.c	2022-11-07 19:09:53.543560261 -0800
+++ b/src/Display.c	2022-11-07 19:11:41.337732726 -0800
@@ -346,12 +346,16 @@
     /*
      * Save away argv and argc so we can set the properties later
      */
-    saved_argv = XtMallocArray((Cardinal) *argc_in_out + 1,
-                               (Cardinal) sizeof(_XtString));
+    if (*argv_in_out != NULL) {
+       saved_argv = (String *)
+               __XtMalloc( (Cardinal)((*argc_in_out + 1) * sizeof(String)) );
 
-    for (i = 0; i < *argc_in_out; i++)
-        saved_argv[i] = (*argv_in_out)[i];
-    saved_argv[i] = NULL;       /* NULL terminate that sucker. */
+    for (i = 0 ; i < *argc_in_out ; i++)
+               saved_argv[i] = (*argv_in_out)[i];
+       saved_argv[i] = NULL;   /* NULL terminate that sucker. */
+    } else {
+       saved_argv = NULL;
+    }
 
     *app_context_return = XtCreateApplicationContext();