[Bug fortran/107899] ICE in resolve_deallocate_expr, at fortran/resolve.cc:7576

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107899

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |anlauf at gcc dot gnu.org
   Last reconfirmed|                            |2022-11-28
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from anlauf at gcc dot gnu.org ---
Confirmed.

Tentative patch for NULL pointer dereference:

diff --git a/gcc/fortran/resolve.cc b/gcc/fortran/resolve.cc
index 3396c6ce4a7..ea67de7c07a 100644
--- a/gcc/fortran/resolve.cc
+++ b/gcc/fortran/resolve.cc
@@ -7570,7 +7573,7 @@ resolve_deallocate_expr (gfc_expr *e)
   sym = e->symtree->n.sym;
   unlimited = UNLIMITED_POLY(sym);

-  if (sym->ts.type == BT_CLASS)
+  if (sym->ts.type == BT_CLASS && sym->attr.class_ok)
     {
       allocatable = CLASS_DATA (sym)->attr.allocatable;
       pointer = CLASS_DATA (sym)->attr.class_pointer;