[Bug fortran/98638] [11 Regression] ICE: Segmentation fault (in lookup_page_table_entry) since r11-6411-gae99b315ba5b9e1c

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98638

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fortran lang_decl has

struct GTY(()) lang_decl {
  /* Dummy variables.  */
  tree saved_descriptor;

and that eventually contains _121->r (SSA names which refer to def stmts
which refer to BBs).  The decl is reachable via an abstract origin.

I suppose the saved_descriptor has a tree sharing "issue" with sth
gimplified.