File ksh93-nvtree-free.dif of Package ksh
--- src/cmd/ksh93/sh/nvtree.c.orig 2015-03-17 16:00:01.111718083 +0000 +++ src/cmd/ksh93/sh/nvtree.c 2015-03-17 16:00:31.560586300 +0000 @@ -1152,6 +1152,8 @@ static void put_tree(register Namval_t * nv_putv(np, val, flags,fp); if(val && nv_isattr(np,(NV_INTEGER|NV_BINARY))) return; + if (!val && !np->nvfun) + return; if(ap= nv_arrayptr(np)) nleft = array_elem(ap); if(nleft==0)