Arch Linux

I did not try to reproduce, but I had 9 layers which I wanted to dispose in a regular 3x3 matrix.
I chose the alignment tools, selected the layers, put some offsets and when I clicked the button Gimp crashedwith the following report.

```
GNU Image Manipulation Program version 2.10.12
git-describe: GIMP_2_10_10-209-g3d8535b55f
C compiler:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/9.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --enable-multilib --disable-werror --enable-checking=release --enable-default-pie --enable-default-ssp --enable-cet=auto
Thread model: posix
gcc version 9.1.0 (GCC)

using GEGL version 0.4.16 (compiled against version 0.4.16)
using GLib version 2.62.0 (compiled against version 2.60.7)
using GdkPixbuf version 2.38.2 (compiled against version 2.38.1)
using GTK+ version 2.24.32 (compiled against version 2.24.32)
using Pango version 1.44.6 (compiled against version 1.44.6)
using Fontconfig version 2.13.91 (compiled against version 2.13.1)
using Cairo version 1.17.3 (compiled against version 1.17.3)

```
> fatal error: Segmentation fault

Stack trace:
```

# Stack traces obtained from PID 12789 - Thread 12799 #

[New LWP 12790]
[New LWP 12791]
[New LWP 12792]
[New LWP 12793]
[New LWP 12794]
[New LWP 12795]
[New LWP 12796]
[New LWP 12797]
[New LWP 12798]
[New LWP 12799]
[New LWP 12819]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
0x00007f25f4907667 in poll () from /usr/lib/libc.so.6
Id Target Id Frame
* 1 Thread 0x7f25f33d1d00 (LWP 12789) "gimp-2.10" 0x00007f25f4907667 in poll () from /usr/lib/libc.so.6
2 Thread 0x7f25f2f03700 (LWP 12790) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
3 Thread 0x7f25f2702700 (LWP 12791) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
4 Thread 0x7f25f1f01700 (LWP 12792) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
5 Thread 0x7f25f1700700 (LWP 12793) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
6 Thread 0x7f25f0eff700 (LWP 12794) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
7 Thread 0x7f25e3fff700 (LWP 12795) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
8 Thread 0x7f25e37fe700 (LWP 12796) "worker" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6
9 Thread 0x7f25e2bc8700 (LWP 12797) "gmain" 0x00007f25f4907667 in poll () from /usr/lib/libc.so.6
10 Thread 0x7f25e23c7700 (LWP 12798) "gdbus" 0x00007f25f4907667 in poll () from /usr/lib/libc.so.6
11 Thread 0x7f25c3fff700 (LWP 12799) "async" 0x00007f25f49eba6c in read () from /usr/lib/libpthread.so.0
12 Thread 0x7f25c2e9d700 (LWP 12819) "swap writer" 0x00007f25f490ce3d in syscall () from /usr/lib/libc.so.6

Thread 12 (Thread 0x7f25c2e9d700 (LWP 12819)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f518b35e in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7f25c3fff700 (LWP 12799)):
#0 0x00007f25f49eba6c in read () at /usr/lib/libpthread.so.0
#1 0x00007f25f5fce2ac in gimp_stack_trace_print () at /usr/lib/libgimpbase-2.0.so.0
#2 0x00005584ad1634c0 in ()
#3 0x00005584ad163918 in ()
#4 0x00005584ad163fab in ()
#5 0x00007f25f49ecd00 in <signal handler called> () at /usr/lib/libpthread.so.0
#6 0x00007f25f49781c9 in __memset_avx2_unaligned_erms () at /usr/lib/libc.so.6
#7 0x00007f25f51704cf in () at /usr/lib/libgegl-0.4.so.0
#8 0x00005584ad497f2b in ()
#9 0x00005584ad454e95 in ()
#10 0x00005584ad454fba in ()
#11 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#12 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#13 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f25e23c7700 (LWP 12798)):
#0 0x00007f25f4907667 in poll () at /usr/lib/libc.so.6
#1 0x00007f25f4bae130 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f4baf0d3 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3 0x00007f25f4d1cb18 in () at /usr/lib/libgio-2.0.so.0
#4 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#5 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f25e2bc8700 (LWP 12797)):
#0 0x00007f25f4907667 in poll () at /usr/lib/libc.so.6
#1 0x00007f25f4bae130 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f4bae201 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3 0x00007f25f4bae252 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#5 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#6 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f25e37fe700 (LWP 12796)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f25e3fff700 (LWP 12795)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f25f0eff700 (LWP 12794)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f25f1700700 (LWP 12793)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f25f1f01700 (LWP 12792)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f25f2702700 (LWP 12791)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f25f2f03700 (LWP 12790)):
#0 0x00007f25f490ce3d in syscall () at /usr/lib/libc.so.6
#1 0x00007f25f4b5e531 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f5151634 in () at /usr/lib/libgegl-0.4.so.0
#3 0x00007f25f4b8abc1 in () at /usr/lib/libglib-2.0.so.0
#4 0x00007f25f49e257f in start_thread () at /usr/lib/libpthread.so.0
#5 0x00007f25f49120e3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f25f33d1d00 (LWP 12789)):
#0 0x00007f25f4907667 in poll () at /usr/lib/libc.so.6
#1 0x00007f25f4bae130 in () at /usr/lib/libglib-2.0.so.0
#2 0x00007f25f4baf0d3 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3 0x00005584ad162c4e in app_run ()
#4 0x00005584ad1624ea in main ()
[Inferior 1 (process 12789) detached]

```