app/gimpbrushpipe.c
Double frees due to dangling pointers [gimpbrushpipe.c
CVS-1.27 Lines 396 ff]. Upon failure to load an n-th
pixmap, a GPattern holding the dangling pointers would
be released first, also releasing n-1 pixmap's name and
RGB mask. These would again be freed in pipe and GTK
deconstruction.