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[SergeiS <1969246@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

I am working with a pretty large file with dimensions 24,000 x 42,000. I
am selecting a circular region with a diameter of 12,000, filling it
with color and trying to shrink the selection by 5,000. I am getting a
crash each and every time I try to shrink the selection.


```
GNU Image Manipulation Program version 2.10.14
git-describe: GIMP_2_10_12-511-ga4f55d6c7e
C compiler:
	Using built-in specs.
	COLLECT_GCC=gcc
	COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
	OFFLOAD_TARGET_NAMES=nvptx-none
	OFFLOAD_TARGET_DEFAULT=1
	Target: x86_64-linux-gnu
	Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.4.0-1ubuntu1~18.04.1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
	Thread model: posix
	gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1) 

using babl version 0.1.72 (compiled against version 0.1.72)
using GEGL version 0.4.18 (compiled against version 0.4.18)
using GLib version 2.56.4 (compiled against version 2.56.4)
using GdkPixbuf version 2.36.11 (compiled against version 2.36.11)
using GTK+ version 2.24.32 (compiled against version 2.24.32)
using Pango version 1.40.14 (compiled against version 1.40.14)
using Fontconfig version 2.12.6 (compiled against version 2.12.6)
using Cairo version 1.15.10 (compiled against version 1.15.10)

```
> fatal error: Segmentation fault

Stack trace:
```
/usr/lib/libgimpbase-2.0.so.0(gimp_stack_trace_print+0x327)[0x7fa4493dbfc7]
gimp-2.10(+0xd7ab4)[0x5575bc9eaab4]
gimp-2.10(+0xd80b8)[0x5575bc9eb0b8]
gimp-2.10(+0xd87c7)[0x5575bc9eb7c7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x12980)[0x7fa445f6b980]
/lib/x86_64-linux-gnu/libc.so.6(+0x16c6a0)[0x7fa445cd46a0]
gimp-2.10(+0x4d61f4)[0x5575bcde91f4]
/usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0(+0x6cba6)[0x7fa447e33ba6]
/usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0(gegl_operation_process+0x227)[0x7fa447e38ac7]
/usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0(gegl_graph_process+0x101)[0x7fa447e3a951]
/usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0(gegl_eval_manager_apply+0xd5)[0x7fa447e39ba5]
/usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0(+0x5bd78)[0x7fa447e22d78]
/usr/lib/x86_64-linux-gnu/libgegl-0.4.so.0(gegl_node_blit+0x2ed)[0x7fa447e2341d]
gimp-2.10(gimp_gegl_apply_cached_operation+0x45e)[0x5575bcdfab9e]
gimp-2.10(gimp_gegl_apply_shrink+0x15a)[0x5575bcdfb8ba]
gimp-2.10(+0x3cb116)[0x5575bccde116]
gimp-2.10(+0x105364)[0x5575bca18364]
/usr/lib/libgimpwidgets-2.0.so.0(+0x55766)[0x7fa44a981766]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x19d)[0x7fa446a410bd]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x2300e)[0x7fa446a5400e]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0xa75)[0x7fa446a5c6f5]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x8f)[0x7fa446a5d10f]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x19d)[0x7fa446a410bd]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x2300e)[0x7fa446a5400e]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0xa75)[0x7fa446a5c6f5]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x8f)[0x7fa446a5d10f]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x8d6f5)[0x7fa44a3776f5]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x19d)[0x7fa446a410bd]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x230de)[0x7fa446a540de]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0xa75)[0x7fa446a5c6f5]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x8f)[0x7fa446a5d10f]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x8c679)[0x7fa44a376679]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x13238b)[0x7fa44a41c38b]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x19d)[0x7fa446a410bd]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x22d98)[0x7fa446a53d98]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0x40f)[0x7fa446a5c08f]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x8f)[0x7fa446a5d10f]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x2482bc)[0x7fa44a5322bc]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(gtk_propagate_event+0xac)[0x7fa44a41a62c]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(gtk_main_do_event+0x2fb)[0x7fa44a41aa2b]
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0(+0x5b02c)[0x7fa44a09002c]
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_context_dispatch+0x2e7)[0x7fa446766537]
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0(+0x4c770)[0x7fa446766770]
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0(g_main_loop_run+0xc2)[0x7fa446766a82]
gimp-2.10(app_run+0x350)[0x5575bc9ea470]
gimp-2.10(main+0x37c)[0x5575bc9e9d3c]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7)[0x7fa445b89c87]
gimp-2.10(_start+0x2a)[0x5575bc9e9eda]

```

** Affects: gimp (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1969246

Title:
  GIMP crashes on selection shrink

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