Tree view crashes immediately without non-fatal-assertions.h, is buggy with it

[ctrlcctrlv]

(fsv:261909): fsv-CRITICAL **: 19:34:38.429: file ../src/geometry.c: line 1483 (geometry_treev_get_extents): assertion failed: (!geometry_treev_is_leaf( dnode ))

(fsv:261909): fsv-CRITICAL **: 19:34:38.429: file ../src/geometry.c: line 1415 (geometry_treev_platform_theta): assertion failed: (!geometry_treev_is_leaf( dnode ) || (((NodeDesc *)(dnode)->data)->type == NODE_METANODE))

(for non-fatal-assertions.h see #4)