Running the following elisp causes a modal dialog to open that cannot be
closed (none of 'yes', 'no' or the close window buttons do anything).
When this happens, I also cannot interact with the main emacs frame:
(let ((last-nonmenu-event nil)
(use-dialog-box t))
(y-or-n-p "foo "))
Backtraces after getting running the above elisp (sorry I don't have gdb installed):
(lldb) thread backtrace all
* thread #1: tid = 0x76aa31, 0x00007fff9ad20a1a libsystem_kernel.dylib`mach_msg_trap + 10, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
* frame #0: 0x00007fff9ad20a1a libsystem_kernel.dylib`mach_msg_trap + 10
frame #1: 0x00007fff9ad1fd18 libsystem_kernel.dylib`mach_msg + 64
frame #2: 0x00007fff923a1fc5 CoreFoundation`__CFRunLoopServiceMachPort + 181
frame #3: 0x00007fff923a15e9 CoreFoundation`__CFRunLoopRun + 1161
frame #4: 0x00007fff923a0f25 CoreFoundation`CFRunLoopRunSpecific + 309
frame #5: 0x00007fff955faa0d HIToolbox`RunCurrentEventLoopInMode + 226
frame #6: 0x00007fff955fa7b7 HIToolbox`ReceiveNextEventCommon + 479
frame #7: 0x00007fff955fa5bc HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 65
frame #8: 0x00007fff8efb126e AppKit`_DPSNextEvent + 1434
frame #9: 0x00007fff8efb08bb AppKit`-[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 122
frame #10: 0x00007fff8f30fe2e AppKit`-[NSApplication _realDoModalLoop:peek:] + 642
frame #11: 0x00007fff8f30e54e AppKit`-[NSApplication runModalForWindow:] + 117
frame #12: 0x000000010017c840 Emacs`-[EmacsDialogPanel runDialogAt:] + 225
frame #13: 0x000000010017b60c Emacs`ns_popup_dialog + 707
frame #14: 0x00000001001064a0 Emacs`Ffuncall + 1037
frame #15: 0x000000010013876e Emacs`exec_byte_code + 2069
frame #16: 0x0000000100106ecc Emacs`funcall_lambda + 761
frame #17: 0x0000000100105cd5 Emacs`apply_lambda + 285
frame #18: 0x0000000100102f2f Emacs`eval_sub + 959
frame #19: 0x00000001001033de Emacs`Fprogn + 31
frame #20: 0x0000000100104283 Emacs`Flet + 635
frame #21: 0x0000000100102f56 Emacs`eval_sub + 998
frame #22: 0x0000000100105ba3 Emacs`Feval + 99
frame #23: 0x000000010010637b Emacs`Ffuncall + 744
frame #24: 0x000000010013876e Emacs`exec_byte_code + 2069
frame #25: 0x0000000100106ecc Emacs`funcall_lambda + 761
frame #26: 0x00000001001062e7 Emacs`Ffuncall + 596
frame #27: 0x000000010013876e Emacs`exec_byte_code + 2069
frame #28: 0x0000000100106ecc Emacs`funcall_lambda + 761
frame #29: 0x00000001001062e7 Emacs`Ffuncall + 596
frame #30: 0x0000000100101ca6 Emacs`Fcall_interactively + 4866
frame #31: 0x00000001001064a0 Emacs`Ffuncall + 1037
frame #32: 0x000000010010694b Emacs`call3 + 53
frame #33: 0x0000000100099e5f Emacs`command_loop_1 + 2813
frame #34: 0x0000000100104c8c Emacs`internal_condition_case + 282
frame #35: 0x00000001000a8e56 Emacs`command_loop_2 + 53
frame #36: 0x000000010010476c Emacs`internal_catch + 212
frame #37: 0x0000000100098b98 Emacs`recursive_edit_1 + 321
frame #38: 0x0000000100098cde Emacs`Frecursive_edit + 250
frame #39: 0x0000000100097ba6 Emacs`main + 4891
thread #3: tid = 0x76ab55, 0x00007fff9ad25662 libsystem_kernel.dylib`kevent64 + 10, queue = 'com.apple.libdispatch-manager'
frame #0: 0x00007fff9ad25662 libsystem_kernel.dylib`kevent64 + 10
frame #1: 0x00007fff9a9ed421 libdispatch.dylib`_dispatch_mgr_invoke + 239
frame #2: 0x00007fff9a9ed136 libdispatch.dylib`_dispatch_mgr_thread + 52
thread #5: tid = 0x76ab57, 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #0: 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #1: 0x00007fff90548f08 libsystem_pthread.dylib`_pthread_wqthread + 330
thread #6: tid = 0x76ab58, 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #0: 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #1: 0x00007fff90548f08 libsystem_pthread.dylib`_pthread_wqthread + 330
thread #7: tid = 0x76ab59, 0x00007fff9ad249aa libsystem_kernel.dylib`__select + 10
frame #0: 0x00007fff9ad249aa libsystem_kernel.dylib`__select + 10
frame #1: 0x0000000100168a35 Emacs`-[EmacsApp fd_handler:] + 237
frame #2: 0x00007fff99bff76b Foundation`__NSThread__main__ + 1318
frame #3: 0x00007fff90547899 libsystem_pthread.dylib`_pthread_body + 138
frame #4: 0x00007fff9054772a libsystem_pthread.dylib`_pthread_start + 137
thread #8: tid = 0x76ab5a, 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #0: 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #1: 0x00007fff90548f08 libsystem_pthread.dylib`_pthread_wqthread + 330
thread #9: tid = 0x76ab5e, 0x00007fff9ad20a1a libsystem_kernel.dylib`mach_msg_trap + 10
frame #0: 0x00007fff9ad20a1a libsystem_kernel.dylib`mach_msg_trap + 10
frame #1: 0x00007fff9ad1fd18 libsystem_kernel.dylib`mach_msg + 64
frame #2: 0x00007fff923a1fc5 CoreFoundation`__CFRunLoopServiceMachPort + 181
frame #3: 0x00007fff923a15e9 CoreFoundation`__CFRunLoopRun + 1161
frame #4: 0x00007fff923a0f25 CoreFoundation`CFRunLoopRunSpecific + 309
frame #5: 0x00007fff8f15105e AppKit`_NSEventThread + 144
frame #6: 0x00007fff90547899 libsystem_pthread.dylib`_pthread_body + 138
frame #7: 0x00007fff9054772a libsystem_pthread.dylib`_pthread_start + 137
thread #10: tid = 0x76abc8, 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #0: 0x00007fff9ad24e6a libsystem_kernel.dylib`__workq_kernreturn + 10
frame #1: 0x00007fff90548f08 libsystem_pthread.dylib`_pthread_wqthread + 330
In GNU Emacs 24.3.1 (x86_64-apple-darwin13.1.0, NS apple-appkit-1265.19)
Windowing system distributor `Apple', version 10.3.1265
Configured using:
`configure '--prefix=/usr/local/Cellar/emacs/24.3' '--without-dbus'
'--enable-locallisppath=/usr/local/share/emacs/site-lisp'
'--infodir=/usr/local/Cellar/emacs/24.3/share/info/emacs'
'--without-gnutls' '--with-ns' '--disable-ns-self-contained'
'CC=clang''
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Lisp Interaction
Minor modes in effect:
window-numbering-mode: t
iswitchb-mode: t
show-paren-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
M-x e m a c s C-a C-k r e p o <tab> r t <tab> <ret
urn>
Recent messages:
For information about GNU Emacs and the GNU system, type M-h C-a.
Making completion list...
Load-path shadows:
None found.
Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils help-mode easymenu ack-and-a-half thingatpt grep
compile comint ansi-color ring ack-and-a-half-autoloads package
cc-styles cc-align cc-engine cc-vars cc-defs edmacro kmacro
column-marker window-numbering uniquify advice help-fns cl-lib
advice-preload pod-mode iswitchb paren time-date tooltip ediff-hook
vc-hooks lisp-float-type mwheel ns-win tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process ns multi-tty emacs)