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From: john p <jp101 AT gmx DOT com>
To: cygwin AT cygwin DOT com
Subject: emacs-27.2-1 windows7 cygwin64-3.3.4-2 crash when open remote file
larger than 10240 bytes
Date: Wed, 30 Mar 2022 05:08:09 +0200
Importance: normal
Sensitivity: Normal
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--sgnirk-3f6ccb8f-ccd0-454a-ae86-7e1fa5acf440
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to reproduce:

  emacs -Q -nw
    C-x C-f /-:<host>:<file>

stackdump & gdb backtrace attached

problem only seen with:
  emacs-27.2-1 windows7 cygwin-3.3.4-2

problem doesnt happen with:
  emacs-27.2-1 windows7 cygwin-3.3.3-1
  emacs-27.2-1 windows10 cygwin-3.3.4-2

hopefully someone knows significance of 10240 byte file/buffer in emacs/windows7/cygwin64-3.3.4-2

--sgnirk-3f6ccb8f-ccd0-454a-ae86-7e1fa5acf440
Content-Type: application/octet-stream
Content-Disposition: attachment; filename=emacs-X11.exe.stackdump

Stack trace:
Frame        Function    Args
00100A0C850  001800620B7 (00000000000, 00000011058, 00000000000, 000FFFFDE50)
00000000000  001800640F5 (00000000000, 00600000000, 00000000430, 00000000000)
00100A0CF60  00180130FD8 (00000000000, 00000000000, 00000000000, 00000000000)
7FFFFFDE000  00180158D7E (A13E63C3D69C9A37, 001004E44D3, 00100A0D2D0, 000FFFFDE50)
7FFFFFDE000  0018012CCF5 (00000000000, 00000000000, 00000000000, 00000000400)
7FFFFFDE000  0018018FBDB (00000000000, 00000000000, 00000000000, 00000000400)
7FFFFFDE000  001005FAFFC (00000000000, 00000000000, 00000000000, 00180158F10)
7FFFFFDE000  001005FD4BE (00000000000, 00000000000, 00000000000, 00100A0D2D0)
7FFFFFDE000  001004FDEE4 (00000000000, 00000000000, 00000000000, 001004FDF30)
7FFFFFDE000  001004FDF53 (00000000000, 00000000000, 00000000000, 00000000000)
7FFFFFDE000  001800609D2 (00000000000, 00000000000, 00000000000, 000FFFFCE00)
00020000000  00180064037 (00000000002, FFFFFFFFFFFFFFFE, FFFFFFFFFFFFFFFE, 00000000006)
FFFFFFFFFFFFFFFE  FFFFFFFFFFFFFFFE (FFFFFFFFFFFFFFFE, FFFFFFFFFFFFFFFE, 00000000006, 0000000009E)
FFFFFFFFFFFFFFFE  00000000002 (FFFFFFFFFFFFFFFE, 00000000006, 0000000009E, 000000000A2)
FFFFFFFFFFFFFFFE  00000000002 (00000000006, 0000000009E, 000000000A2, 00000000002)
FFFFFFFFFFFFFFFE  FFFFFFFFFFFFFFFE (0000000009E, 000000000A2, 00000000002, 0000000003A)
FFFFFFFFFFFFFFFE  FFFFFFFFFFFFFFFE (000000000A2, 00000000002, 0000000003A, 00000000042)
FFFFFFFFFFFFFFFE  00000000006 (00000000002, 0000000003A, 00000000042, 0000000004A)
FFFFFFFFFFFFFFFE  0000000009E (0000000003A, 00000000042, 0000000004A, 00000000012)
FFFFFFFFFFFFFFFE  000000000A2 (00000000042, 0000000004A, 00000000012, 00000000022)
FFFFFFFFFFFFFFFE  00000000002 (0000000004A, 00000000012, 00000000022, 00000000032)
FFFFFFFFFFFFFFFE  0000000003A (00000000012, 00000000022, 00000000032, 00000000036)
FFFFFFFFFFFFFFFE  00000000042 (00000000022, 00000000032, 00000000036, 00000000016)
FFFFFFFFFFFFFFFE  0000000004A (00000000032, 00000000036, 00000000016, 00000000002)
FFFFFFFFFFFFFFFE  00000000012 (00000000036, 00000000016, 00000000002, 00000000002)
FFFFFFFFFFFFFFFE  00000000022 (00000000016, 00000000002, 00000000002, 00000000002)
FFFFFFFFFFFFFFFE  00000000032 (00000000002, 00000000002, 00000000002, 00000000002)
FFFFFFFFFFFFFFFE  00000000036 (00000000002, 00000000002, 00000000002, 00000000026)
FFFFFFFFFFFFFFFE  00000000016 (00000000002, 00000000002, 00000000026, 0000000002A)
FFFFFFFFFFFFFFFE  00000000002 (00000000002, 00000000026, 0000000002A, 0000000002E)
FFFFFFFFFFFFFFFE  00000000002 (00000000026, 0000000002A, 0000000002E, 0000000004E)
FFFFFFFFFFFFFFFE  00000000002 (0000000002A, 0000000002E, 0000000004E, 00000000052)
End of stack trace (more stack frames may be present)

--sgnirk-3f6ccb8f-ccd0-454a-ae86-7e1fa5acf440
Content-Type: application/octet-stream
Content-Disposition: attachment; filename=gdb.backtrace

(gdb) bt
#0  0x000007fefd7e1b54 in WriteFile () from /c/Windows/system32/KERNELBASE.dll
#1  0x00000000777c1d26 in WriteFile () from /c/Windows/system32/kernel32.dll
#2  0x00000001800bbba0 in fhandler_pty_master::close (this=0x18035b5f8) at /usr/src/debug/cygwin-3.3.4-2/winsup/cygwin/fhandler_tty.cc:2123
#3  0x000000018006b875 in fhandler_base::close_with_arch (this=0x18035b2e8) at /usr/src/debug/cygwin-3.3.4-2/winsup/cygwin/fhandler.cc:1193
#4  0x000000018014331d in close (fd=10) at /usr/src/debug/cygwin-3.3.4-2/winsup/cygwin/syscalls.cc:1652
#5  0x000000018018fbdb in _sigfe () at sigfe.s:35
#6  0x00000001004ffb57 in posix_close (flag=1, fd=10) at /usr/src/debug/emacs-27.2-1/src/sysdep.c:2547
#7  emacs_close (fd=10) at /usr/src/debug/emacs-27.2-1/src/sysdep.c:2565
#8  0x000000010059e1b9 in close_process_fd (fd_addr=0x800423d4c) at /usr/src/debug/emacs-27.2-1/src/process.c:1989
#9  deactivate_process (proc=proc AT entry=0x800423c85) at /usr/src/debug/emacs-27.2-1/src/process.c:4742
#10 0x000000010059e571 in remove_process (proc=0x800423c85) at /usr/src/debug/emacs-27.2-1/src/process.c:923
#11 status_notify (deleting_process=deleting_process AT entry=0x0, wait_proc=wait_proc AT entry=0x0) at /usr/src/debug/emacs-27.2-1/src/process.c:7479
#12 0x00000001005a3abf in wait_reading_process_output (time_limit=<optimized out>, nsecs=<optimized out>, read_kbd=read_kbd AT entry=-1, do_display=do_display AT entry=true, wait_for_cell=wait_for_cell AT entry=0x0, wait_proc=wait_proc AT entry=0x0,
    just_wait_proc=just_wait_proc AT entry=0) at /usr/src/debug/emacs-27.2-1/src/process.c:5400
#13 0x000000010040b16f in sit_for (timeout=timeout AT entry=0x7a, reading=reading AT entry=true, display_option=display_option AT entry=1) at /usr/src/debug/emacs-27.2-1/src/lisp.h:1027
#14 0x00000001004f2068 in read_char (commandflag=commandflag AT entry=1, map=map AT entry=0x800355173, prev_event=0x0, used_mouse_menu=used_mouse_menu AT entry=0xffffc61b, end_time=end_time AT entry=0x0) at /usr/src/debug/emacs-27.2-1/src/keyboard.c:2738
#15 0x00000001004f2ab1 in read_key_sequence (keybuf=keybuf AT entry=0xffffc780, prompt=prompt AT entry=0x0, dont_downcase_last=dont_downcase_last AT entry=false, can_return_switch_frame=can_return_switch_frame AT entry=true, fix_current_buffer=fix_current_buffer AT entry=true,
    prevent_redisplay=prevent_redisplay AT entry=false) at /usr/src/debug/emacs-27.2-1/src/keyboard.c:9554
#16 0x00000001004f423f in command_loop_1 () at /usr/src/debug/emacs-27.2-1/src/lisp.h:1027
#17 0x000000010055f144 in internal_condition_case (bfun=bfun AT entry=0x1004f4020 <command_loop_1>, handlers=handlers AT entry=0x90, hfun=hfun AT entry=0x1004eae00 <cmd_error>) at /usr/src/debug/emacs-27.2-1/src/eval.c:1356
#18 0x00000001004e4ba8 in command_loop_2 (ignore=<optimized out>) at /usr/src/debug/emacs-27.2-1/src/lisp.h:1027
#19 0x000000010055f09e in internal_catch (tag=tag AT entry=0xd380, func=func AT entry=0x1004e4b80 <command_loop_2>, arg=arg AT entry=0x0) at /usr/src/debug/emacs-27.2-1/src/eval.c:1117
#20 0x00000001004e4b38 in command_loop () at /usr/src/debug/emacs-27.2-1/src/lisp.h:1027
#21 0x00000001004ea9d1 in recursive_edit_1 () at /usr/src/debug/emacs-27.2-1/src/keyboard.c:714
#22 0x00000001004ead27 in Frecursive_edit () at /usr/src/debug/emacs-27.2-1/src/keyboard.c:786
#23 0x00000001005fc881 in main (argc=3, argv=<optimized out>) at /usr/src/debug/emacs-27.2-1/src/emacs.c:2067
(gdb)

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