Setting the fringe background color to "undefined", or setting the default face background color to "green" or "Green" causes crashes in draw_fringe_bitmap_1 and x_set_background_color, respectively. To produce the below crashes, I used M-x customize-face. The crash occurs after clicking on "Set for current session". Note that the color per se seems to be recognized correctly at first, since the "sample" next to the color field is colored correctly. This is an unpatched Emacs from CVS (atomized.org build). Process: Emacs [94673] Path: /Users/dr/Downloads/Emacs.app/Contents/MacOS/Emacs Identifier: org.gnu.Emacs Version: Version 23.0.91 (9.0) Code Type: X86 (Native) Parent Process: launchd [76] Date/Time: 2009-03-02 13:34:42.191 -0500 OS Version: Mac OS X 10.5.6 (9G55) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGABRT) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000c0000003 Crashed Thread: 0 Thread 0 Crashed: 0 libSystem.B.dylib 0x9019ce42 __kill + 10 1 org.gnu.Emacs 0x00091aca fatal_error_signal + 314 2 libSystem.B.dylib 0x9019b2bb _sigtramp + 43 3 ??? 0xffffffff 0 + 4294967295 4 libSystem.B.dylib 0x9020f23a raise + 26 5 libSystem.B.dylib 0x9021b679 abort + 73 6 org.gnu.Emacs 0x0016c185 ns_term_shutdown + 117 7 org.gnu.Emacs 0x00091b1f fatal_error_signal + 399 8 libSystem.B.dylib 0x9019b2bb _sigtramp + 43 9 ??? 0xffffffff 0 + 4294967295 10 org.gnu.Emacs 0x0018befc draw_fringe_bitmap_1 + 748 11 org.gnu.Emacs 0x0018c46a draw_fringe_bitmap + 90 12 org.gnu.Emacs 0x0018c6b8 draw_row_fringe_bitmaps + 136 13 org.gnu.Emacs 0x0018c799 draw_window_fringes + 185 14 org.gnu.Emacs 0x00166d31 ns_update_window_end + 337 15 org.gnu.Emacs 0x000081e9 update_window + 793 16 org.gnu.Emacs 0x00009833 update_window_tree + 147 17 org.gnu.Emacs 0x0000aa92 update_frame + 194 18 org.gnu.Emacs 0x000363eb redisplay_internal + 4411 19 org.gnu.Emacs 0x000369aa redisplay_preserve_echo_area + 170 20 org.gnu.Emacs 0x0009f300 read_char + 1760 21 org.gnu.Emacs 0x000a1e04 read_key_sequence + 884 22 org.gnu.Emacs 0x000a432a command_loop_1 + 570 23 org.gnu.Emacs 0x001079ad internal_condition_case + 253 24 org.gnu.Emacs 0x00093dc8 command_loop_2 + 72 25 org.gnu.Emacs 0x0010788c internal_catch + 172 26 org.gnu.Emacs 0x00093b1e command_loop + 174 27 org.gnu.Emacs 0x00093be2 recursive_edit_1 + 146 28 org.gnu.Emacs 0x00093d61 Frecursive_edit + 257 29 org.gnu.Emacs 0x000926a5 main + 2885 30 org.gnu.Emacs 0x000029d6 start + 54 Thread 0 crashed with X86 Thread State (32-bit): eax: 0x00000000 ebx: 0x0009199e ecx: 0xbfffe24c edx: 0x9019ce42 edi: 0x00000006 esi: 0x00000006 ebp: 0xbfffe268 esp: 0xbfffe24c ss: 0x0000001f efl: 0x00000286 eip: 0x9019ce42 cs: 0x00000007 ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037 cr2: 0x01b19000 Process: Emacs [94691] Path: /Users/dr/Downloads/Emacs.app/Contents/MacOS/Emacs Identifier: org.gnu.Emacs Version: Version 23.0.91 (9.0) Code Type: X86 (Native) Parent Process: launchd [76] Date/Time: 2009-03-02 13:36:04.388 -0500 OS Version: Mac OS X 10.5.6 (9G55) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGABRT) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000ffefd955 Crashed Thread: 0 Thread 0 Crashed: 0 libSystem.B.dylib 0x9019ce42 __kill + 10 1 org.gnu.Emacs 0x00091aca fatal_error_signal + 314 2 libSystem.B.dylib 0x9019b2bb _sigtramp + 43 3 ??? 0xffffffff 0 + 4294967295 4 libSystem.B.dylib 0x9020f23a raise + 26 5 libSystem.B.dylib 0x9021b679 abort + 73 6 org.gnu.Emacs 0x0016c185 ns_term_shutdown + 117 7 org.gnu.Emacs 0x00091b1f fatal_error_signal + 399 8 libSystem.B.dylib 0x9019b2bb _sigtramp + 43 9 ??? 0xffffffff 0 + 4294967295 10 org.gnu.Emacs 0x00177b88 x_set_background_color + 504 11 org.gnu.Emacs 0x00012406 x_set_frame_parameters + 486 12 org.gnu.Emacs 0x00012f62 Fmodify_frame_parameters + 434 13 org.gnu.Emacs 0x0008a273 Finternal_set_lisp_face_attribute + 1251 14 org.gnu.Emacs 0x00109a88 Ffuncall + 1016 15 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 16 org.gnu.Emacs 0x00109311 funcall_lambda + 209 17 org.gnu.Emacs 0x0010985b Ffuncall + 459 18 org.gnu.Emacs 0x0010b275 Fapply + 245 19 org.gnu.Emacs 0x001099f3 Ffuncall + 867 20 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 21 org.gnu.Emacs 0x00109311 funcall_lambda + 209 22 org.gnu.Emacs 0x0010985b Ffuncall + 459 23 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 24 org.gnu.Emacs 0x00109311 funcall_lambda + 209 25 org.gnu.Emacs 0x0010985b Ffuncall + 459 26 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 27 org.gnu.Emacs 0x00109311 funcall_lambda + 209 28 org.gnu.Emacs 0x0010985b Ffuncall + 459 29 org.gnu.Emacs 0x0010adc9 call1 + 25 30 org.gnu.Emacs 0x0008e4c9 update_face_from_frame_parameter + 377 31 org.gnu.Emacs 0x00177b1f x_set_background_color + 399 32 org.gnu.Emacs 0x00012406 x_set_frame_parameters + 486 33 org.gnu.Emacs 0x00012f62 Fmodify_frame_parameters + 434 34 org.gnu.Emacs 0x0008a273 Finternal_set_lisp_face_attribute + 1251 35 org.gnu.Emacs 0x00109a88 Ffuncall + 1016 36 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 37 org.gnu.Emacs 0x00109311 funcall_lambda + 209 38 org.gnu.Emacs 0x0010985b Ffuncall + 459 39 org.gnu.Emacs 0x0010b275 Fapply + 245 40 org.gnu.Emacs 0x001099f3 Ffuncall + 867 41 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 42 org.gnu.Emacs 0x00109311 funcall_lambda + 209 43 org.gnu.Emacs 0x0010985b Ffuncall + 459 44 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 45 org.gnu.Emacs 0x00109311 funcall_lambda + 209 46 org.gnu.Emacs 0x0010985b Ffuncall + 459 47 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 48 org.gnu.Emacs 0x00109311 funcall_lambda + 209 49 org.gnu.Emacs 0x0010985b Ffuncall + 459 50 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 51 org.gnu.Emacs 0x00109311 funcall_lambda + 209 52 org.gnu.Emacs 0x0010985b Ffuncall + 459 53 org.gnu.Emacs 0x0010b290 Fapply + 272 54 org.gnu.Emacs 0x0011504e Fwidget_apply + 78 55 org.gnu.Emacs 0x001099f3 Ffuncall + 867 56 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 57 org.gnu.Emacs 0x00109311 funcall_lambda + 209 58 org.gnu.Emacs 0x0010985b Ffuncall + 459 59 org.gnu.Emacs 0x0010adc9 call1 + 25 60 org.gnu.Emacs 0x00113ac6 mapcar1 + 518 61 org.gnu.Emacs 0x00113ea1 Fmapc + 81 62 org.gnu.Emacs 0x00109a88 Ffuncall + 1016 63 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 64 org.gnu.Emacs 0x00109311 funcall_lambda + 209 65 org.gnu.Emacs 0x0010985b Ffuncall + 459 66 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 67 org.gnu.Emacs 0x00109311 funcall_lambda + 209 68 org.gnu.Emacs 0x0010985b Ffuncall + 459 69 org.gnu.Emacs 0x0010b37c Fapply + 508 70 org.gnu.Emacs 0x0011504e Fwidget_apply + 78 71 org.gnu.Emacs 0x001099f3 Ffuncall + 867 72 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 73 org.gnu.Emacs 0x00109311 funcall_lambda + 209 74 org.gnu.Emacs 0x0010985b Ffuncall + 459 75 org.gnu.Emacs 0x00144c4b Fbyte_code + 3835 76 org.gnu.Emacs 0x00108e76 Feval + 1062 77 org.gnu.Emacs 0x0010788c internal_catch + 172 78 org.gnu.Emacs 0x00145606 Fbyte_code + 6326 79 org.gnu.Emacs 0x00109311 funcall_lambda + 209 80 org.gnu.Emacs 0x0010985b Ffuncall + 459 81 org.gnu.Emacs 0x00105c32 Fcall_interactively + 3330 82 org.gnu.Emacs 0x00109a61 Ffuncall + 977 83 org.gnu.Emacs 0x00109c19 call3 + 25 84 org.gnu.Emacs 0x000a4571 command_loop_1 + 1153 85 org.gnu.Emacs 0x001079ad internal_condition_case + 253 86 org.gnu.Emacs 0x00093dc8 command_loop_2 + 72 87 org.gnu.Emacs 0x0010788c internal_catch + 172 88 org.gnu.Emacs 0x00093b1e command_loop + 174 89 org.gnu.Emacs 0x00093be2 recursive_edit_1 + 146 90 org.gnu.Emacs 0x00093d61 Frecursive_edit + 257 91 org.gnu.Emacs 0x000926a5 main + 2885 92 org.gnu.Emacs 0x000029d6 start + 54 Thread 0 crashed with X86 Thread State (32-bit): eax: 0x00000000 ebx: 0x0009199e ecx: 0xbfffca0c edx: 0x9019ce42 edi: 0x00000006 esi: 0x00000006 ebp: 0xbfffca28 esp: 0xbfffca0c ss: 0x0000001f efl: 0x00000282 eip: 0x9019ce42 cs: 0x00000007 ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037 cr2: 0xffefd955