[Bug c++/100599] New: internal compiler error: Segmentation fault

[Bug c++/100599] New: internal compiler error: Segmentation fault

[mu11 at yahoo dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100599

            Bug ID: 100599
           Summary: internal compiler error: Segmentation fault
           Product: gcc
           Version: 11.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mu11 at yahoo dot com
  Target Milestone: ---

Created attachment 50812
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50812&action=edit
test case for bug

gcc crashes with an internal error.
Using the attached test case:

% g++ -c -std=c++11 x2.cpp
x2.cpp: In substitution of ‘template<class _Rep, class _Period> template<class
_Period2> using __is_harmonic = std::__bool_constant<(std::ratio<_Period::den,
std::duration<_Rep, _Period>::_S_gcd(5, 3)>::den == 1)> [with _Period2 =
_Period2; _Rep = _Rep; _Period = _Period]’:
x2.cpp:92:142:   required from here
x2.cpp:83:23: internal compiler error: Segmentation fault
   83 | static constexpr long _S_gcd(long __m, long __n) noexcept
      |                       ^~~~~~
0xcbd91f crash_signal
        ../../gcc-11.1.0/gcc/toplev.c:327
0x7a4921 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-11.1.0/gcc/cp/pt.c:15649
0x7b75f1 tsubst_template_args(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-11.1.0/gcc/cp/pt.c:13418
0x7afb00 tsubst_aggr_type
        ../../gcc-11.1.0/gcc/cp/pt.c:13621
0x7ba32e tsubst_function_decl
        ../../gcc-11.1.0/gcc/cp/pt.c:14020
0x7b0529 tsubst_decl
        ../../gcc-11.1.0/gcc/cp/pt.c:14513
0x79f1c5 tsubst_copy
        ../../gcc-11.1.0/gcc/cp/pt.c:16747
0x7a0c90 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:20950
0x7a1199 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19587
0x7a1199 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:20223
0x7b2954 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19587
0x7b2954 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19198
0x7b75f1 tsubst_template_args(tree_node*, tree_node*, int, tree_node*)
        ../../gcc-11.1.0/gcc/cp/pt.c:13418
0x7afb00 tsubst_aggr_type
        ../../gcc-11.1.0/gcc/cp/pt.c:13621
0x7a0535 tsubst_qualified_id
        ../../gcc-11.1.0/gcc/cp/pt.c:16448
0x7a19f6 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19948
0x7a0b03 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19587
0x7a0b03 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19910
0x7b2954 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19587
0x7b2954 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
        ../../gcc-11.1.0/gcc/cp/pt.c:19198

[Bug c++/100599] ICE in tree check: accessed elt 2 of ‘tree_vec’ with 1 elts in tsubst, at cp/pt.c:15649

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100599

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
                 CC|                            |marxin at gcc dot gnu.org
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2021-05-14
            Summary|internal compiler error:    |ICE in tree check: accessed
                   |Segmentation fault          |elt 2 of ‘tree_vec’ with 1
                   |                            |elts in tsubst, at
                   |                            |cp/pt.c:15649

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's old ICE.

[Bug c++/100599] ICE in tree check: accessed elt 2 of ‘tree_vec’ with 1 elts in tsubst, at cp/pt.c:15649

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100599

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED
                 CC|                            |ppalka at gcc dot gnu.org

--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Looks like this is essentially a dup of PR100102

*** This bug has been marked as a duplicate of bug 100102 ***