What did I do:

- I started Gimp 2.0
- I created a new file
- I clicked the text tool icon
- I clicked with the text tool cursor on my picture
- I wrote a letter in the now open text editor textbox. The letter did
  appear on the picture but not in the textbox.
- The following messages were print to console:

----------- ===== MSG START ===== ----------------
(gimp-2.0:4378): GLib-GObject-WARNING **: invalid unclassed pointer in cast to
`GimpConfigInterface'

(gimp-2.0:4378): Gimp-Config-CRITICAL **: file gimpconfig-utils.c: line 300
(gimp_config_sync): assertion `GIMP_IS_CONFIG (src)' failed

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gobject.c: line 1319
(g_object_ref): assertion `G_IS_OBJECT (object)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gsignal.c: line 1861
(g_signal_connect_data): assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: invalid unclassed pointer in cast to
`GimpConfigInterface'

(gimp-2.0:4378): Gimp-Config-CRITICAL **: file gimpconfig-utils.c: line 300
(gimp_config_sync): assertion `GIMP_IS_CONFIG (src)' failed

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gobject.c: line 1319
(g_object_ref): assertion `G_IS_OBJECT (object)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gsignal.c: line 1861
(g_signal_connect_data): assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: invalid unclassed pointer in cast to
`GimpConfigInterface'

(gimp-2.0:4378): Gimp-Config-CRITICAL **: file gimpconfig-utils.c: line 300
(gimp_config_sync): assertion `GIMP_IS_CONFIG (src)' failed

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gobject.c: line 1319
(g_object_ref): assertion `G_IS_OBJECT (object)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gsignal.c: line 1861
(g_signal_connect_data): assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: invalid unclassed pointer in cast to
`GimpObject'

(gimp-2.0:4378): Gimp-Core-CRITICAL **: file gimpobject.c: line 388
(gimp_object_get_memsize): assertion `GIMP_IS_OBJECT (object)' failed

----------===== MSG END =====----------


- I pressed another key
- The following were print to console:



----------===== MSG START =====----------

(gimp-2.0:4378): GLib-GObject-WARNING **: invalid uninstantiatable type
`<unknown>' in cast to `GimpConfigInterface'

(gimp-2.0:4378): Gimp-Config-CRITICAL **: file gimpconfig-utils.c: line 300
(gimp_config_sync): assertion `GIMP_IS_CONFIG (src)' failed

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gobject.c: line 1319
(g_object_ref): assertion `G_IS_OBJECT (object)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: instance of invalid non-instantiatable
type `(null)'

(gimp-2.0:4378): GLib-GObject-CRITICAL **: file gsignal.c: line 1861
(g_signal_connect_data): assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gimp-2.0:4378): GLib-GObject-WARNING **: invalid unclassed pointer in cast to
`GimpConfigInterface'
Segmentation fault (core dumped)

(script-fu:4380): LibGimpBase-WARNING **: script-fu: wire_read(): error

----------===== MSG END =====----------


- Then gimp crashed back to console.

- I tried this a few time. Sometimes it crashes after the first letter
  sometimes after the second letter.

- I also tried it with different fonts and font sizes.

- When it crashes after the first letter only the second messages are
  printed to console.