[Bug server/31338] New: MinGW error on detach: gdbserver/inferiors.cc:160: A problem internal to GDBserver has been detected

["dmitry.neverov at jetbrains dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31338

            Bug ID: 31338
           Summary: MinGW error on detach: gdbserver/inferiors.cc:160: A
                    problem internal to GDBserver has been detected
           Product: gdb
           Version: 14.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: server
          Assignee: unassigned at sourceware dot org
          Reporter: dmitry.neverov at jetbrains dot com
  Target Milestone: ---

Happens in latest MinGW:
https://github.com/brechtsanders/winlibs_mingw/releases
winlibs-i686-posix-dwarf-gcc-14.0.0-snapshot20240107-mingw-w64msvcrt-11.0.1-r1.7z

To reproduce:

- compile the program

#include <stdio.h>
#include <windows.h>

int main(void) {
  for (int i = 0; i < 10000; i++) {
    printf("%d\n", i);
    Sleep(1000);
  }
  return 0;
}

- run mingw32/bin/gdbserver.exe --once localhost:4242 a.exe

- run mingw32/bin/gdb.exe -nx and execute the commands:

(gdb) file a.exe
(gdb) target remote tcp:localhost:4242
(gdb) b main.c:7
(gdb) continue
(gdb) detach

Gdbserver process is terminated, the a.exe keeps running.

Gdbserver output:
Listening on port 4242
Remote debugging from host ::1, port 65172
0
Detaching from process 6476
../../gdbserver/inferiors.cc:160: A problem internal to GDBserver has been
detected.
remove_process: Assertion `find_thread_process (process) == NULL' failed.

Gdb output:
(gdb) file a.exe
Reading symbols from a.exe...
(gdb) target remote tcp:localhost:4242
Remote debugging using tcp:localhost:4242
Reading C:\WINDOWS\SysWOW64\ntdll.dll from remote target...
warning: File transfers from remote targets can be slow. Use "set sysroot" to
access files locally instead.
Reading C:\WINDOWS\SysWOW64\kernel32.dll from remote target...
Reading C:\WINDOWS\SysWOW64\KernelBase.dll from remote target...
Reading C:\WINDOWS\SysWOW64\msvcrt.dll from remote target...
Reading
c:/R/winlibs32_stage/inst_gdb-14.1/share/gdb/lib/debug/.build-id/ce/2f4b523d856940ee33aaab0cab37b0.debug
from remote target...
Reading
c:/R/winlibs32_stage/inst_gdb-14.1/share/gdb/lib/debug/.build-id/ae/8ddde49412d714d51c90cdaeb34527.debug
from remote target...
Reading
c:/R/winlibs32_stage/inst_gdb-14.1/share/gdb/lib/debug/.build-id/49/8edfaad5f9f445d4e77e14f7de2807.debug
from remote target...
Reading
c:/R/winlibs32_stage/inst_gdb-14.1/share/gdb/lib/debug/.build-id/34/f7f72739101e3b219e5fc1e36b0435.debug
from remote target...
0x776c8088 in ntdll!LdrInitShimEngineDynamic () from
target:C:\WINDOWS\SysWOW64\ntdll.dll
(gdb) b main.c:7
Breakpoint 1 at 0x8f15fe: file main.c, line 7.
(gdb) continue
Continuing.

Thread 1 hit Breakpoint 1, main () at main.c:7
7           Sleep(1000);
(gdb) detach
Detaching from program: c:\w\CLionProjects\CLoop\a.exe, Remote target
Remote communication error.  Target disconnected: No error.
(gdb)

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