https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86916
--- Comment #1 from Roger Mc Murtrie <rogermc at iinet dot net.au> --- I am also getting this problem with gcc 6.1.0 +===========================GNAT BUG DETECTED==============================+ | 6.1.0 (x86_64-apple-darwin15) GCC error: | | in gnat_to_gnu_entity, at ada/gcc-interface/decl.c:3011 | | Error detected at assimp_texture.ads:65:34 As I have used gcc 6.1.0 with getting this error in the past I'm wondering if it has something to do with OSX. Mac mini (Mid 2011) OSX 10.13.6 Xcode 9.4.1