gdb plugin jpeg and png problems...

jag@jagnome:/opt/gimp-default-master/bin$ gdb --args ./gimp-2.9 --g-fatal-warnings
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
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Reading symbols from ./gimp-2.9...done.
(gdb) run
Starting program: /opt/gimp-default-master/bin/gimp-2.9 --g-fatal-warnings
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe709a700 (LWP 30574)]
[New Thread 0x7fffe6899700 (LWP 30575)]
This is a development version of GIMP.  Debug messages may appear here.

[New Thread 0x7fffd5086700 (LWP 30577)]
Missing fast-path babl conversion detected, Implementing missing babl fast paths
accelerates GEGL, GIMP and other software using babl, warnings are printed on
first occurance of formats used where a conversion has to be synthesized
programmatically by babl based on format description

*WARNING*: missing babl fast path(s) between formats "CIE LCH(ab) double" and "R'G'B' double"
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
Warning: Unknown setting_id: -1 for setting: offset_angle
Warning: Unknown setting_id: -1 for setting: offset_angle_2
Warning: Unknown setting_id: -1 for setting: offset_x
Warning: Unknown setting_id: -1 for setting: offset_y
[New Thread 0x7fffc15f1700 (LWP 30582)]
[Thread 0x7fffc15f1700 (LWP 30582) exited]
[file-darktable.c] trying to call 'darktable'
[file-darktable.c] stdout:
this is darktable 2.0.7
copyright (c) 2009-2016 johannes hanika
darktable-dev@lists.darktable.org

compile options:
  bit depth is 64 bit
  normal build
  OpenMP support enabled
  OpenCL support enabled
  Lua support enabled, API version 3.0.0
  Colord support enabled
  gPhoto2 support enabled
  GraphicsMagick support enabled
  OpenEXR support enabled

[file-darktable.c] have_darktable: 1
[Thread 0x7fffd5086700 (LWP 30577) exited]
gimp_display_shell_profile_update
gimp_display_shell_profile_update
gimp_display_shell_profile_update
[New Thread 0x7fffd5086700 (LWP 30725)]
[New Thread 0x7fffc15f1700 (LWP 30726)]
*WARNING*: missing babl fast path(s) between formats "cairo-ARGB32" and "R'G'B'A u8"
[Thread 0x7fffd5086700 (LWP 30725) exited]
magic match 8 on file-png-load
best magic match on file-png-load
[New Thread 0x7fffd5086700 (LWP 30740)]
/opt/gimp-default-master/lib/gimp/2.0/plug-ins/file-png: fatal error: Segmentation fault
/opt/gimp-default-master/lib/gimp/2.0/plug-ins/file-png (pid:30738): [E]xit, [H]alt, show [S]tack trace or [P]roceed: [Thread 0x7fffc15f1700 (LWP 30726) exited]
p
plug-in 'file-png' aborted before sending its procedure return values