https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77351
--- Comment #2 from kargl at gcc dot gnu.org ---
Thou shalt not derefernce NULL pointers.
troutmask:sgk[238] svn diff frontend-passes.c
Index: frontend-passes.c
===================================================================
--- frontend-passes.c (revision 239661)
+++ frontend-passes.c (working copy)
@@ -1137,6 +1137,8 @@ remove_trim (gfc_expr *rhs)
bool ret;
ret = false;
+ if (!rhs)
+ return ret;
/* Check for a // b // trim(c). Looping is probably not
necessary because the parser usually generates
@@ -1274,6 +1276,9 @@ combine_array_constructor (gfc_expr *e)
op1 = e->value.op.op1;
op2 = e->value.op.op2;
+ if (!op1 || !op2)
+ return false;
+
if (op1->expr_type == EXPR_ARRAY && op2->rank == 0)
scalar_first = false;
else if (op2->expr_type == EXPR_ARRAY && op1->rank == 0)
