https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65771
--- Comment #2 from ktkachov at gcc dot gnu.org ---
The loc tree that ends up hitting the gcc_unreachable is:
<debug_expr_decl 0x7ffff72511e0 D.4294967294
type <integer_type 0x7ffff7035690 int sizes-gimplified asm_written public
SI
size <integer_cst 0x7ffff7031eb8 constant 32>
unit size <integer_cst 0x7ffff7031ed0 constant 4>
align 32 symtab -151568224 alias set 1 canonical type 0x7ffff7035690
precision 32 min <integer_cst 0x7ffff7043108 -2147483648> max <integer_cst
0x7ffff7043120 2147483647>
pointer_to_this <pointer_type 0x7ffff7049930>>
visited SI file traces.i line 7 col 1
align 1
(debug_expr:SI D#2)>
