21.5b9 on MacOSX build problem

The following problem has been reported several times on the Fink mailing lists, but no idea has come forth. Building XEmacs 21.5beta9 with the fink build system (which does nothing special) fails on some machines towards the end when the newly compiled emacs is dumped and then used for the first time. A typical failure message I get on one of my machines is Dumping under the name xemacs Testing for Lisp shadows ... make[1]: *** [xemacs.dmp] Bus error make[1]: *** Deleting file `xemacs.dmp' make: *** [src] Error 2 On another machine I get a failure at the same place: Dumping under the name xemacs Testing for Lisp shadows ... Symbol's value as variable is void: frame xemacs exiting . make[1]: *** [xemacs.dmp] Error 255 make: *** [src] Error 2 On both machines, this happens every time, and on both it did not happen with the previous version of XEmacs, which was 21.5.4. What is even weirder is that a strikingly similar problem occurs when building GNU Emacs. For some people, there is an error at the same place in the build process: ./emacs -q -batch -f list-load-path-shadows make[1]: *** [emacs] Illegal instruction There are people who get this every time and others for whom this does not appear. When the bus error happens, MacOSX gives a nice Crash Report which I attach below. It is the same crash report every time. Hopefully someone will see from this what is going on here. To me it looks like something inside the garbage collection routine. Any ideas welcome! Thanks. Martin ********** Date/Time: 2002-10-07 22:59:15 +0200 OS Version: 10.2.1 (Build 6D52) Host: hilbert.math.univ-rennes1.fr Command: xemacs PID: 16859 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000004 Thread 0 Crashed: #0 0x0013555c in cleanup_specifiers (specifier.c:126) #1 0x00048058 in Ffuncall (eval.c:3696) #2 0x000147e4 in execute_optimized_program (bytecode.c:676) #3 0x0005034c in funcall_compiled_function (eval.c:3409) #4 0x00048560 in Ffuncall (eval.c:3799) #5 0x000147e4 in execute_optimized_program (bytecode.c:676) #6 0x0005034c in funcall_compiled_function (eval.c:3409) #7 0x00048560 in Ffuncall (eval.c:3799) #8 0x000a10f4 in mapcar1 (fns.c:3163) #9 0x0009fa90 in Fmapcar (fns.c:3276) #10 0x00048510 in Ffuncall (eval.c:3785) #11 0x000147e4 in execute_optimized_program (bytecode.c:676) #12 0x0005034c in funcall_compiled_function (eval.c:3409) #13 0x00048560 in Ffuncall (eval.c:3799) #14 0x000147e4 in execute_optimized_program (bytecode.c:676) #15 0x0005034c in funcall_compiled_function (eval.c:3409) #16 0x00048560 in Ffuncall (eval.c:3799) #17 0x000147e4 in execute_optimized_program (bytecode.c:676) #18 0x0005034c in funcall_compiled_function (eval.c:3409) #19 0x000479b0 in Feval (eval.c:3605) #20 0x000452bc in condition_case_1 (eval.c:1875) #21 0x00015460 in execute_rare_opcode (bytecode.c:1201) #22 0x0001461c in execute_optimized_program (bytecode.c:581) #23 0x0005034c in funcall_compiled_function (eval.c:3409) #24 0x000479b0 in Feval (eval.c:3605) #25 0x000452bc in condition_case_1 (eval.c:1875) #26 0x000201c8 in top_level_1 (cmdloop.c:214) #27 0x00045108 in internal_catch (eval.c:1489) #28 0x0001fc80 in initial_command_loop (cmdloop.c:298) #29 0x00042220 in sort_args (emacs.c:2449) #30 0x00042b0c in Fdump_emacs (emacs.c:2818) #31 0x00002668 in _start (crt.c:267) #32 0x000024e8 in start PPC Thread State: srr0: 0x0013555c srr1: 0x0200f030 vrsave: 0x00000000 xer: 0x00000000 lr: 0x00135510 ctr: 0x00050d44 mq: 0x00000000 r0: 0x00002889 r1: 0xbfffd890 r2: 0x00d4f708 r3: 0x002a2dc0 r4: 0x00000000 r5: 0x001d4e4c r6: 0x00005fd0 r7: 0x001d72ac r8: 0x001d9294 r9: 0x00000001 r10: 0x00050d98 r11: 0x00000001 r12: 0x002a2ea4 r13: 0x00000001 r14: 0x00000000 r15: 0x001d5c98 r16: 0x001d5c98 r17: 0x001d5c98 r18: 0x001d5c98 r19: 0x001d5c98 r20: 0x00aa0190 r21: 0x00000000 r22: 0x00000010 r23: 0x001d5510 r24: 0x002a2dc0 r25: 0x001d5510 r26: 0x002a2dc0 r27: 0x00e8ae10 r28: 0x00d4e778 r29: 0x00d4f708 r30: 0x00d4e778 r31: 0x00135510