[Bug gdb/25560] Assertion `pid != 0' failed

["erickitten at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=25560

Che-Kang Wu <erickitten at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |erickitten at gmail dot com

--- Comment #9 from Che-Kang Wu <erickitten at gmail dot com> ---
I found the same assertion fail on Windows 10 (Mingw32) to ARM cross-gdb when
remote debugging.
Bug 24825 also shows a similar issue, not sure if this is the same.

1) Example program
#include <stdio.h>
int main (void)
{
   printf("Hello world!\n");
   return 1;
}

2) Compile
arm-linux-gnueabihf-gcc -g 1.c

3) Remote
./gdbserver :12000 ./a.out
Process ./hello created; pid = 1421
Listening on port 12000

4) gdb host
arm-linux-gnueabihf-gdb.exe
GNU gdb (GDB) 9.2
(gdb)  show configuration
This GDB was configured as follows:
   configure --host=i686-w64-mingw32 --target=arm-linux-gnueabihf
             --with-auto-load-dir=$debugdir:$datadir/auto-load
             --with-auto-load-safe-path=$debugdir:$datadir/auto-load
             --with-expat
             --with-gdb-datadir=/usr/local/share/gdb (relocatable)
             --with-jit-reader-dir=/usr/local/lib/gdb (relocatable)
             --without-libunwind-ia64
             --without-lzma
             --without-babeltrace
                             --without-intel-pt
             --without-mpfr
             --without-xxhash
             --without-python
             --without-guile
             --disable-source-highlight
             --with-separate-debug-dir=/usr/local/lib/debug (relocatable)

5) Set breakpoint
(gdb) target remote xxx.xxx.xxx.xxx:12000

(gdb) b main
(gdb) c
Breakpoint 1, main () at 1.c:6
6          printf("Hello world!\n");

6) This works normally
(gdb) c
Continuing.
[Inferior 1 (process 1463) exited with code 01]
(gdb) q

7) But this fails
(gdb) n
# Next step to end

Single stepping until exit from function __libc_start_main,
which has no line number information.
[Inferior 1 (process 1457) exited with code 01]
You can't do that without a process to debug.
(gdb) q
/home/eric/project/standalone-build/source/gdb-9.2/gdb-build/../gdb/inferior.c:283:
internal-error: inferior* find_inferior_pid(int): Assertion `pid != 0' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y

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