https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87737
--- Comment #1 from G. Steinmetz <gs...@t-online.de> --- Configured with --enable-checking=yes : $ gfortran-9-20181021-chk -c z1.f90 -O2 during IPA pass: inline f951: internal compiler error: tree check: expected ssa_name, have addr_expr in remap_gimple_op_r, at tree-inline.c:923 0x5e3e24 tree_check_failed(tree_node const*, char const*, int, char const*, ...) ../../gcc/tree.c:9369 0xd0409e tree_check(tree_node*, char const*, int, char const*, tree_code) ../../gcc/tree.h:3118 0xd0409e remap_gimple_op_r ../../gcc/tree-inline.c:923 0xf5c593 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node* (*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*)) ../../gcc/tree.c:11513 0x9c6b6c walk_gimple_op(gimple*, tree_node* (*)(tree_node**, int*, void*), walk_stmt_info*) ../../gcc/gimple-walk.c:268 0xcfd1b1 remap_gimple_stmt ../../gcc/tree-inline.c:1777 0xcfe4c4 copy_bb ../../gcc/tree-inline.c:1827 0xd0019c copy_cfg_body ../../gcc/tree-inline.c:2719 0xd0019c copy_body ../../gcc/tree-inline.c:2961 0xd05c82 expand_call_inline ../../gcc/tree-inline.c:4691 0xd08a64 gimple_expand_calls_inline ../../gcc/tree-inline.c:4886 0xd08a64 optimize_inline_calls(tree_node*) ../../gcc/tree-inline.c:5026 0x153c0eb inline_transform(cgraph_node*) ../../gcc/ipa-inline-transform.c:682 0xb92786 execute_one_ipa_transform_pass ../../gcc/passes.c:2170 0xb92786 execute_all_ipa_transforms() ../../gcc/passes.c:2212 0x8278af cgraph_node::expand() ../../gcc/cgraphunit.c:2187 0x828e20 expand_all_functions ../../gcc/cgraphunit.c:2332 0x828e20 symbol_table::compile() ../../gcc/cgraphunit.c:2683 0x82b9c6 symbol_table::compile() ../../gcc/cgraphunit.c:2864 0x82b9c6 symbol_table::finalize_compilation_unit() ../../gcc/cgraphunit.c:2861