Hi! Using XEmacs 21.2 (beta34) "Molpe" [Lucid] (i386-unknown-freebsd3.2) of Thu Jun 22 2000 on sokrates I encountered the following core dump while trying to get a function's description. Sorry, no lisp stack, only C: #0 0x284cdc78 in kill () from /usr/lib/libc.so.3 #1 0x80b09c3 in fatal_error_signal (sig=11) at emacs.c:514 #2 0xbfbfdfdc in ?? () #3 0x81289fb in mark_image_instance (obj=150147072) at glyphs.c:784 #4 0x807fa34 in mark_object (obj=150147072) at alloc.c:2500 #5 0x807d2c6 in mark_cons (obj=150026568) at alloc.c:877 #6 0x807fa34 in mark_object (obj=150026568) at alloc.c:2500 #7 0x80db31a in mark_widget_value_mapper (val=0x8eea300, closure=0x0) at gui-x.c:70 #8 0x81eb79a in lw_map_widget_values (id=66374, mapfunc=0x80db300 <mark_widget_value_mapper>, closure=0x0) at lwlib.c:446 #9 0x80db2f6 in mark_popup_data (obj=148911008) at gui-x.c:90 #10 0x807fa34 in mark_object (obj=150026580) at alloc.c:2500 #11 0x807d2c6 in mark_cons (obj=150026592) at alloc.c:877 #12 0x807fa34 in mark_object (obj=148646252) at alloc.c:2500 #13 0x8080de1 in garbage_collect_1 () at alloc.c:3449 #14 0x80b906f in Ffuncall (nargs=2, args=0xbfbfcbf4) at eval.c:3163 #15 0x808ea4e in execute_optimized_program ( program=0xbfbfcc60 "À \031Â\216ÃÄ\r!!\210\212ÆÇ!ÈU«\023`fzÉa¬\f`fzÊa¬\005ËÌ!\210ÍÎw\210Ïp!\211\036\0209­\tÑ\016\020!­\003\016\020,\207", stack_depth=4, constants_data=0x83f1210) at bytecode.c:745 #16 0x809157c in Fbyte_code (instructions=138451780, constants=138351104, stack_depth=9) at bytecode.c:2404 #17 0x80b8802 in Feval (form=138240832) at eval.c:3014 #18 0x80b60eb in condition_case_3 (bodyform=138240832, var=136955908, handlers=138209956) at eval.c:1640 #19 0x808f4dd in execute_rare_opcode (stack_ptr=0xbfbfcf3c, program_ptr=0x8c778b4 "®\005ÀÃÄ\217\207\b", opcode=Bcondition_case) at bytecode.c:1270 #20 0x808e83e in execute_optimized_program ( program=0x8c778b0 "ÀÁÂ\217®\005ÀÃÄ\217\207\b", stack_depth=3, constants_data=0x8403950) at bytecode.c:655 #21 0x808e663 in funcall_compiled_function (fun=138447132, nargs=0, args=0xbfbfcfe0) at bytecode.c:517 ... norbert -- Yes, Private DOBERMAN!!