[Bug c++/90747] New: Internal compiler error: Error reporting routines re-entered.

[mbelivea at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90747

            Bug ID: 90747
           Summary: Internal compiler error: Error reporting routines
                    re-entered.
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mbelivea at redhat dot com
  Target Milestone: ---

struct a {};
template <typename> struct b { a operator*(); };
template <typename c, typename d> c e(d);
template <typename, typename d> auto e(b<d> f) -> decltype(e<int>(*f)) {}
void blah() { e<a>(b<int>{}); }

$ ./cc1plus -quiet f.ii
‘
Internal compiler error: Error reporting routines re-entered.
0x9d0882 push_tinst_level_loc
        /home/mbelivea/src/gcc/gcc/cp/pt.c:10258
0x9d09e1 push_tinst_level
        /home/mbelivea/src/gcc/gcc/cp/pt.c:10301
0xa02c62 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:20200
0x850f06 add_template_candidate_real
        /home/mbelivea/src/gcc/gcc/cp/call.c:3315
0x85188c add_template_candidate
        /home/mbelivea/src/gcc/gcc/cp/call.c:3400
0x85188c add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:5724
0x856ea7 add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:4388
0x856ea7 perform_overload_resolution
        /home/mbelivea/src/gcc/gcc/cp/call.c:4396
0x85a245 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
        /home/mbelivea/src/gcc/gcc/cp/call.c:4470
0xa44a2d finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
        /home/mbelivea/src/gcc/gcc/cp/semantics.c:2584
0x9fd7bd tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:19093
0x9e8091 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:15140
0x9e3f50 tsubst_function_type
        /home/mbelivea/src/gcc/gcc/cp/pt.c:14167
0x9e7337 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:14947
0xa02d0a fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:20212
0x850f06 add_template_candidate_real
        /home/mbelivea/src/gcc/gcc/cp/call.c:3315
0x85188c add_template_candidate
        /home/mbelivea/src/gcc/gcc/cp/call.c:3400
0x85188c add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:5724
0x856ea7 add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:4388
0x856ea7 perform_overload_resolution
        /home/mbelivea/src/gcc/gcc/cp/call.c:4396
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ ./cc1plus -quiet f.ii
‘
Internal compiler error: Error reporting routines re-entered.
0x9d0882 push_tinst_level_loc
        /home/mbelivea/src/gcc/gcc/cp/pt.c:10258
0x9d09e1 push_tinst_level
        /home/mbelivea/src/gcc/gcc/cp/pt.c:10301
0xa02c62 fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:20200
0x850f06 add_template_candidate_real
        /home/mbelivea/src/gcc/gcc/cp/call.c:3315
0x85188c add_template_candidate
        /home/mbelivea/src/gcc/gcc/cp/call.c:3400
0x85188c add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:5724
0x856ea7 add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:4388
0x856ea7 perform_overload_resolution
        /home/mbelivea/src/gcc/gcc/cp/call.c:4396
0x85a245 build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
        /home/mbelivea/src/gcc/gcc/cp/call.c:4470
0xa44a2d finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
        /home/mbelivea/src/gcc/gcc/cp/semantics.c:2584
0x9fd7bd tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:19093
0x9e8091 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:15140
0x9e3f50 tsubst_function_type
        /home/mbelivea/src/gcc/gcc/cp/pt.c:14167
0x9e7337 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:14947
0xa02d0a fn_type_unification(tree_node*, tree_node*, tree_node*, tree_node*
const*, unsigned int, tree_node*, unification_kind_t, int, conversion**, bool,
bool)
        /home/mbelivea/src/gcc/gcc/cp/pt.c:20212
0x850f06 add_template_candidate_real
        /home/mbelivea/src/gcc/gcc/cp/call.c:3315
0x85188c add_template_candidate
        /home/mbelivea/src/gcc/gcc/cp/call.c:3400
0x85188c add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:5724
0x856ea7 add_candidates
        /home/mbelivea/src/gcc/gcc/cp/call.c:4388
0x856ea7 perform_overload_resolution
        /home/mbelivea/src/gcc/gcc/cp/call.c:4396
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.