https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72808
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Surprisingly, started with r222991:
commit 6ad400d246a3bf399e8090e09a0c84eac33a8fd1
Author: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon May 11 02:51:51 2015 +0000
* tree.c (verify_type_variant): Check TYPE_VALUES_RAW and
TYPE_PRECISION
