21.2-b19: hang under Solaris 2.5.1

Building from a brand new CVS tree plus the attached patches from the mailing list, with up-to-date packages, the build hangs exec'ing this command: Compiling files without .elc... /users/lipp/src/xemacs-beta/xemacs-21.2/src/xemacs -batch -vanilla -f batch-byte-compile lisp/./about.el lisp/./alist.el lisp/./apropos.el lisp/./autoload.el lisp/./blessmail.el lisp/./build-report.el lisp/./callers-of-rpt.el lisp/./check-features.el lisp/./cl-compat.el lisp/./cleantree.el lisp/./config.el lisp/./cus-dep.el lisp/./cus-edit.el lisp/./cus-face.el lisp/./cus-load.el lisp/./custom-load.el lisp/./disass.el lisp/./disp-table.el lisp/./etags.el lisp/./files-nomule.el Attaching to the XEmacs process gives the stack trace in "hang.txt". <<ins-21.2-b19-nodebug.txt>> <<21.2-b20-patch1.txt>> <<21.2-b20-patch2.txt>> <<hang.txt>>