I think I had just pressed "g" in a Gnus summary buffer to get new mail and news. It crashed. C backtrace appended. The Lisp backtrace is in memory somewhere, waiting to be flushed out.... Doesn't look good crashing in GC. Perhaps some forgotten GCPRO? Ray #0 0xfeb16870 in _libc_kill () from /usr/lib/libc.so.1 #1 0xa9924 in fatal_error_signal (sig=11) at emacs.c:514 #2 <signal handler called> #3 0x6a754 in mark_object (obj=256) at alloc.c:2487 #4 0x6c350 in garbage_collect_1 () at alloc.c:3459 #5 0xb4038 in Ffuncall (nargs=1, args=0xffbe97bc) at eval.c:3163 #6 0x7bc6c in execute_optimized_program (program=0xffbe97bc "", stack_depth=1, constants_data=0x82b7d0) at bytecode.c:745 #7 0x7b49c in funcall_compiled_function (fun=8366364, nargs=2, args=0xffbe9a20) at bytecode.c:517 #8 0xb43e4 in Ffuncall (nargs=2, args=0xffbe9a14) at eval.c:3249 #9 0x7bc6c in execute_optimized_program (program=0xffbe9a14 "", stack_depth=2, constants_data=0x823010) at bytecode.c:745 #10 0x7b49c in funcall_compiled_function (fun=4046948, nargs=2, args=0xffbe9c78) at bytecode.c:517 #11 0xb43e4 in Ffuncall (nargs=2, args=0xffbe9c70) at eval.c:3249 #12 0xb548c in call2 (fn=8487324, arg0=3358692, arg1=20919236) at eval.c:3881 #13 0x12b770 in Ffile_truename (filename=3358692, default_=3246084) at fileio.c:1271 #14 0x6e7e4 in Fget_file_buffer (filename=20919236) at buffer.c:471 #15 0xb4204 in Ffuncall (nargs=1, args=0xffbea450) at eval.c:3214 #16 0xb495c in Fapply (nargs=2, args=0xffbea450) at eval.c:3429 #17 0xb4398 in Ffuncall (nargs=2, args=0xffbea44c) at eval.c:3235 #18 0x7bc6c in execute_optimized_program (program=0xffbea44c "", stack_depth=2, constants_data=0x823010) at bytecode.c:745 #19 0x7b49c in funcall_compiled_function (fun=4046948, nargs=2, args=0xffbea6b0) at bytecode.c:517 #20 0xb43e4 in Ffuncall (nargs=2, args=0xffbea6a8) at eval.c:3249 #21 0xb548c in call2 (fn=8487324, arg0=3247620, arg1=20919236) at eval.c:3881 #22 0x6e754 in Fget_file_buffer (filename=20919236) at buffer.c:459 #23 0x6ee58 in get_truename_buffer (filename=20919236) at buffer.c:544 #24 0xc379c in lock_file (fn=20919236) at filelock.c:324 #25 0x12fd94 in Fwrite_region_internal (start=4563, end=10297, filename=20919236, append=3246084, visit=3246084, lockname=20919236, codesys=3816704) at fileio.c:3192 #26 0xb42bc in Ffuncall (nargs=7, args=0xffbeac5c) at eval.c:3214 #27 0x7bc6c in execute_optimized_program (program=0xffbeac5c "", stack_depth=7, constants_data=0x55e410) at bytecode.c:745 #28 0x7b49c in funcall_compiled_function (fun=5605348, nargs=7, args=0xffbeaee8) at bytecode.c:517 #29 0xb43e4 in Ffuncall (nargs=7, args=0xffbeaec8) at eval.c:3249 #30 0xb4b00 in Fapply (nargs=2, args=0xffbeb088) at eval.c:3486 #31 0xb4398 in Ffuncall (nargs=2, args=0xffbeb084) at eval.c:3235 #32 0x7bc6c in execute_optimized_program (program=0xffbeb084 "", stack_depth=2, constants_data=0x823010) at bytecode.c:745 #33 0x7b49c in funcall_compiled_function (fun=4046948, nargs=8, args=0xffbeb2e8) at bytecode.c:517 #34 0xb43e4 in Ffuncall (nargs=8, args=0xffbeb2e0) at eval.c:3249 #35 0xb56b0 in call8 (fn=8487324, arg0=3361372, arg1=4563, arg2=10297, arg3=20919236, arg4=3246084, arg5=3246084, arg6=20919236, arg7=3816704) at eval.c:4002 #36 0x12fa44 in Fwrite_region_internal (start=4563, end=10297, filename=20919236, append=3246084, visit=3246084, lockname=20919236, codesys=3816704) at fileio.c:3171 #37 0xb42bc in Ffuncall (nargs=7, args=0xffbeb644) at eval.c:3214 #38 0x7bc6c in execute_optimized_program (program=0xffbeb644 "", stack_depth=7, constants_data=0x55e410) at bytecode.c:745 #39 0x7b49c in funcall_compiled_function (fun=5605348, nargs=6, args=0xffbeb8d0) at bytecode.c:517 #40 0xb43e4 in Ffuncall (nargs=6, args=0xffbeb8b4) at eval.c:3249 #41 0x7bc6c in execute_optimized_program (program=0xffbeb8b4 "", stack_depth=6, constants_data=0xa35290) at bytecode.c:745 #42 0x7b49c in funcall_compiled_function (fun=10818604, nargs=5, args=0xffbebb34) at bytecode.c:517 #43 0xb43e4 in Ffuncall (nargs=5, args=0xffbebb1c) at eval.c:3249 #44 0x7bc6c in execute_optimized_program (program=0xffbebb1c "", stack_depth=5, constants_data=0xa34410) at bytecode.c:745 #45 0x7b49c in funcall_compiled_function (fun=10850336, nargs=1, args=0xffbebd8c) at bytecode.c:517 #46 0xb43e4 in Ffuncall (nargs=1, args=0xffbebd84) at eval.c:3249 #47 0x7bc6c in execute_optimized_program (program=0xffbebd84 "", stack_depth=1, constants_data=0xa35390) at bytecode.c:745 #48 0x7b49c in funcall_compiled_function (fun=10818436, nargs=3, args=0xffbebfec) at bytecode.c:517 #49 0xb43e4 in Ffuncall (nargs=3, args=0xffbebfdc) at eval.c:3249 #50 0x7bc6c in execute_optimized_program (program=0xffbebfdc "", stack_depth=3, constants_data=0xa34c10) at bytecode.c:745 #51 0x7b49c in funcall_compiled_function (fun=10817708, nargs=2, args=0xffbec258) at bytecode.c:517 #52 0xb43e4 in Ffuncall (nargs=2, args=0xffbec24c) at eval.c:3249 #53 0x7bc6c in execute_optimized_program (program=0xffbec24c "", stack_depth=2, constants_data=0xa35790) at bytecode.c:745 #54 0x7b49c in funcall_compiled_function (fun=10817792, nargs=5, args=0xffbec40c) at bytecode.c:517 #55 0xb3d30 in Feval (form=18177888) at eval.c:3073 #56 0xae460 in Fprogn (args=18178020) at eval.c:768 #57 0xb4d0c in funcall_lambda (fun=18173956, nargs=2, args=0xffbec770) at eval.c:3538 #58 0xb442c in Ffuncall (nargs=2, args=0xffbec76c) at eval.c:3257 #59 0x7bc6c in execute_optimized_program (program=0xffbec76c "\001\025P\004", stack_depth=2, constants_data=0xa35e90) at bytecode.c:745 #60 0x7b49c in funcall_compiled_function (fun=10806652, nargs=2, args=0xffbec9dc) at bytecode.c:517 #61 0xb43e4 in Ffuncall (nargs=2, args=0xffbec9d0) at eval.c:3249 #62 0x7bc6c in execute_optimized_program (program=0xffbec9d0 "", stack_depth=2, constants_data=0xa35d10) at bytecode.c:745 #63 0x7b49c in funcall_compiled_function (fun=10806876, nargs=2, args=0xffbecc3c) at bytecode.c:517 #64 0xb43e4 in Ffuncall (nargs=2, args=0xffbecc30) at eval.c:3249 #65 0xb3c14 in Feval (form=8755444) at eval.c:3040 #66 0xb00b4 in condition_case_1 (handlers=8756008, bfun=0xb3264 <Feval>, barg=8755444, hfun=0xb011c <run_condition_case_handlers>, harg=4987628) at eval.c:1640 #67 0xb04ac in condition_case_3 (bodyform=8755444, var=4987628, handlers=8756008) at eval.c:1721 #68 0x7c9cc in execute_rare_opcode (stack_ptr=0xffbecfd8, program_ptr=0xa97a4a &quot;\\+)\207ar.co.uk&gt;\n&lt;14697.23702.794240.589018(a)mule.mtract-t\026\211{&quot;, opcode=Bcondition_case) at bytecode.c:1270 #69 0x7b9e0 in execute_optimized_program (program=0xffbecfe0 "", stack_depth=143, constants_data=0xa35f10) at bytecode.c:655 #70 0x7b49c in funcall_compiled_function (fun=10806596, nargs=2, args=0xffbed240) at bytecode.c:517 #71 0xb43e4 in Ffuncall (nargs=2, args=0xffbed234) at eval.c:3249 #72 0x7bc6c in execute_optimized_program (program=0xffbed234 "", stack_depth=2, constants_data=0xa2d810) at bytecode.c:745 #73 0x7b49c in funcall_compiled_function (fun=10818492, nargs=4, args=0xffbed4c8) at bytecode.c:517 #74 0xb43e4 in Ffuncall (nargs=4, args=0xffbed4b4) at eval.c:3249 #75 0x7bc6c in execute_optimized_program (program=0xffbed4b4 "", stack_depth=4, constants_data=0xa56e50) at bytecode.c:745 #76 0x7b49c in funcall_compiled_function (fun=10819052, nargs=2, args=0xffbed720) at bytecode.c:517 #77 0xb43e4 in Ffuncall (nargs=2, args=0xffbed714) at eval.c:3249 #78 0x7bc6c in execute_optimized_program (program=0xffbed714 "", stack_depth=2, constants_data=0x996410) at bytecode.c:745 #79 0x7b49c in funcall_compiled_function (fun=9746012, nargs=2, args=0xffbed978) at bytecode.c:517 #80 0xb43e4 in Ffuncall (nargs=2, args=0xffbed96c) at eval.c:3249 #81 0x7bc6c in execute_optimized_program (program=0xffbed96c "", stack_depth=2, constants_data=0x9ee010) at bytecode.c:745 #82 0x7b49c in funcall_compiled_function (fun=10391892, nargs=2, args=0xffbedb28) at bytecode.c:517 #83 0xb3d30 in Feval (form=9401836) at eval.c:3073 #84 0xb00b4 in condition_case_1 (handlers=9357044, bfun=0xb3264 <Feval>, barg=9401836, hfun=0xb011c <run_condition_case_handlers>, harg=3246084) at eval.c:1640 #85 0xb04ac in condition_case_3 (bodyform=9401836, var=3246084, handlers=9357044) at eval.c:1721 #86 0x7c9cc in execute_rare_opcode (stack_ptr=0xffbedec4, program_ptr=0x6a9a54 "\210ªç+\207", opcode=Bcondition_case) at bytecode.c:1270 #87 0x7b9e0 in execute_optimized_program (program=0xffbedecc "", stack_depth=143, constants_data=0x998690) at bytecode.c:655 #88 0x7b49c in funcall_compiled_function (fun=10391864, nargs=0, args=0xffbee128) at bytecode.c:517 #89 0xb43e4 in Ffuncall (nargs=0, args=0xffbee124) at eval.c:3249 #90 0x7bc6c in execute_optimized_program (program=0xffbee124 "", stack_depth=0, constants_data=0xacb610) at bytecode.c:745 #91 0x7b49c in funcall_compiled_function (fun=11397348, nargs=1, args=0xffbee380) at bytecode.c:517 #92 0xb43e4 in Ffuncall (nargs=1, args=0xffbee378) at eval.c:3249 #93 0x82374 in Fcall_interactively (function=10038404, record_flag=3246084, keys=3246084) at callint.c:946 #94 0xb2b6c in Fcommand_execute (cmd=10038404, record=3246084, keys=3246084) at eval.c:2652 #95 0x10f450 in execute_command_event (command_builder=0x649780, event=13944644) at event-stream.c:3838 #96 0x10fea0 in Fdispatch_event (event=13944644) at event-stream.c:4157 #97 0x8c304 in Fcommand_loop_1 () at cmdloop.c:579 #98 0x8c044 in command_loop_1 (dummy=6577920) at cmdloop.c:494 #99 0xb00b4 in condition_case_1 (handlers=3246180, bfun=0x8bff8 <command_loop_1>, barg=3246084, hfun=0x8c4e4 <cmd_error>, harg=3246084) at eval.c:1640 #100 0x8c5f4 in command_loop_2 (dummy=3246084) at cmdloop.c:256 #101 0xafc24 in internal_catch (tag=3328196, func=0x8c5a8 <command_loop_2>, arg=3246084, threw=0x0) at eval.c:1306 #102 0x8b940 in initial_command_loop (load_me=574888) at cmdloop.c:305 #103 0xab64c in xemacs_21_2_b35_sparc_sun_solaris2_7 (argc=4, argv=0xffbeecec, envp=0xffbeed00, restart=0) at emacs.c:2155 #104 0xabe70 in main (argc=4, argv=0xffbeecec, envp=0xffbeed00) at emacs.c:2584