bug#81669: 30.2; NS; Speedbar causes NSInternalInconsistencyException

Recipe to reproduce:

  1. emacs -Q
  2. M-x speedbar RET
    => emacs: Uncaught exception NSInternalInconsistencyException,
       reason: NSApp's run called recursively
       ... abort ...

In GNU Emacs 30.2 (build 2, x86_64-pc-linux-gnu, NS
 gnustep-gui-0.32.0) of 2026-07-04, modified by Debian built on
 patilan
Windowing system distributor 'GNU', version 10.3.32
System Description: Debian GNU/Linux forky/sid

Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/libexec
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --with-libsystemd --with-pop=yes
 --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/30.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/30.2/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --without-gconf --with-mailutils --build
 x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib
 --libexecdir=/usr/libexec --localstatedir=/var/lib
 --infodir=/usr/share/info --mandir=/usr/share/man --with-libsystemd
 --with-pop=yes
 --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/30.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/30.2/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --without-gconf --with-mailutils --with-ns
 --disable-ns-self-contained --without-gif --without-jpeg
 --without-png --without-rsvg --without-tiff --without-webp 'CFLAGS=-g
 -O2 -Werror=implicit-function-declaration
 -ffile-prefix-map=/build/reproducible-path/emacs-30.2+1=. -fstack-protector-strong
 -fstack-clash-protection -Wformat -Werror=format-security
 -fcf-protection -Wall' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
 LDFLAGS=-Wl,-z,relro'

Configured features:
ACL DBUS GMP GNUTLS GPM LCMS2 LIBSELINUX LIBSYSTEMD LIBXML2 MODULES
NATIVE_COMP NOTIFY INOTIFY NS PDUMPER SECCOMP SOUND SQLITE3 THREADS
TOOLKIT_SCROLL_BARS TREE_SITTER XIM ZLIB

Thread 1 "emacs" hit Breakpoint 1, -[NSException raise] (self=0x555558f20240, 
    _cmd=0x7ffff75dfcc0 <_OBJC_SELECTOR_TABLE+480>)
    at ./Source/NSException.m:1602
1602	in ./Source/NSException.m
(gdb) bt
#0  -[NSException raise]
    (self=0x555558f20240, _cmd=0x7ffff75dfcc0 <_OBJC_SELECTOR_TABLE+480>)
    at ./Source/NSException.m:1602
#1  0x00007ffff728e117 in +[NSException raise:format:arguments:]
    (self=<optimized out>, _cmd=<optimized out>, name=0x7ffff75e0690 <_OBJC_INSTANCE_4>, format=0x7ffff7dc1290 <_OBJC_INSTANCE_51.39>, argList=0x7fffffffce50)
    at ./Source/NSException.m:1494
#2  0x00007ffff728ee97 in +[NSException raise:format:]
    (self=0x7ffff75e0000 <_OBJC_Class_NSException>, _cmd=<optimized out>, name=0x7ffff75e0690 <_OBJC_INSTANCE_4>, format=0x7ffff7dc1290 <_OBJC_INSTANCE_51.39>)
    at ./Source/NSException.m:1479
#3  0x00007ffff7a8771f in -[NSApplication run]
    (self=0x5555564dafd0, _cmd=<optimized out>)
    at ./Source/NSApplication.m:1550
#4  0x0000555555830ec6 in ns_read_socket_1
    (hold_quit=<optimized out>, no_release=<optimized out>, terminal=<optimized out>) at ./debian/build-src/src/nsterm.m:4812
#5  0x00005555556d7861 in gobble_input ()
    at ./debian/build-src/src/keyboard.c:7919
#6  0x00005555556d8f10 in get_input_pending (flags=flags@entry=1)
    at ./debian/build-src/src/keyboard.c:7875
#7  0x00005555556dde22 in detect_input_pending_run_timers (do_display=false)
    at ./debian/build-src/src/keyboard.c:11573
#8  read_char
    (commandflag=1, map=map@entry=0x7fffee365683, prev_event=0x0, used_mouse_menu=used_mouse_menu@entry=0x7fffffffd73b, end_time=end_time@entry=0x0)
    at ./debian/build-src/src/keyboard.c:2667
#9  0x00005555556e150f in read_key_sequence
    (keybuf=keybuf@entry=0x7fffffffd890, prompt=prompt@entry=0x0, dont_downcase_last=dont_downcase_last@entry=false, can_return_switch_frame=can_return_switch_frame@entry=true, fix_current_buffer=fix_current_buffer@entry=true, prevent_redisplay=prevent_redisplay@entry=false, disable_text_conversion_p=<optimized out>)
    at ./debian/build-src/src/keyboard.c:10743
#10 0x00005555556e322f in command_loop_1 ()
    at ./debian/build-src/src/keyboard.c:1429
#11 0x000055555576438c in internal_condition_case
    (bfun=bfun@entry=0x5555556e3060 <command_loop_1>, handlers=handlers@entry=0x90, hfun=hfun@entry=0x5555556d6410 <cmd_error>)
    at ./debian/build-src/src/eval.c:1613
#12 0x00005555556cdf36 in command_loop_2 (handlers=0x90)
    at ./debian/build-src/src/keyboard.c:1168
#13 0x00005555557642e6 in internal_catch
    (tag=tag@entry=0x11a00, func=func@entry=0x5555556cdf10 <command_loop_2>, arg=arg@entry=0x90) at ./debian/build-src/src/eval.c:1292
#14 0x00005555556cded3 in command_loop ()
    at ./debian/build-src/src/keyboard.c:1146
#15 0x00005555556d5f56 in recursive_edit_1 ()
    at ./debian/build-src/src/keyboard.c:754
#16 0x00005555556d6324 in Frecursive_edit ()
    at ./debian/build-src/src/keyboard.c:837
#17 0x00005555555eb4b8 in main (argc=<optimized out>, argv=<optimized out>)
    at ./debian/build-src/src/emacs.c:2646