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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/115296] CTAD fails
Date: Fri, 31 May 2024 17:33:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115296

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
                 CC|                            |mpolacek at gcc dot gnu.org
   Last reconfirmed|                            |2024-05-31
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Doesn't look like a regression.

#0  error_at (loc=3D74842051, gmsgid=3D0x38de910 "size %qE of array exceeds=
 maximum
object size %qE")
    at /home/mpolacek/src/gcc/gcc/diagnostic.cc:2137
#1  0x000000000129b72e in invalid_array_size_error (loc=3D74842051,
error=3Dcst_size_too_big,=20
    size=3D<integer_cst 0x7fffea203680>, name=3D<tree 0x0>)
    at /home/mpolacek/src/gcc/gcc/c-family/c-common.cc:9212
#2  0x000000000129b8e2 in valid_array_size_p (loc=3D74842051, t=3D<integer_=
cst
0x7fffea203680>, name=3D<tree 0x0>,=20
    complain=3Dtrue) at /home/mpolacek/src/gcc/gcc/c-family/c-common.cc:9263
#3  0x0000000000ee5c74 in compute_array_index_type_loc (name_loc=3D74842051,
name=3D<tree 0x0>,=20
    size=3D<integer_cst 0x7fffea203680>, complain=3D3) at
/home/mpolacek/src/gcc/gcc/cp/decl.cc:11653
#4  0x0000000000ee61cd in compute_array_index_type (name=3D<tree 0x0>,
size=3D<integer_cst 0x7fffea203680>,=20
    complain=3D3) at /home/mpolacek/src/gcc/gcc/cp/decl.cc:11778
#5  0x000000000111fc4b in tsubst (t=3D<integer_type 0x7fffe941c2a0>,
args=3D<tree_vec 0x7fffe910c5f0>,=20
    complain=3D3, in_decl=3D<function_decl 0x7fffe923ce00 __dguide_span>)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:16317
#6  0x00000000011217bf in tsubst (t=3D<array_type 0x7fffe941c348>, args=3D<=
tree_vec
0x7fffe910c5f0>, complain=3D3,=20
    in_decl=3D<function_decl 0x7fffe923ce00 __dguide_span>) at
/home/mpolacek/src/gcc/gcc/cp/pt.cc:16742
#7  0x000000000111f4a7 in tsubst (t=3D<reference_type 0x7fffe941c3f0>,
args=3D<tree_vec 0x7fffe910c5f0>,=20
    complain=3D3, in_decl=3D<function_decl 0x7fffe923ce00 __dguide_span>)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:16239
#8  0x000000000111d85f in tsubst_arg_types (arg_types=3D<tree_list
0x7fffe9799d48>,=20
    args=3D<tree_vec 0x7fffe910c5f0>, end=3D<tree 0x0>, complain=3D3,=20
    in_decl=3D<function_decl 0x7fffe923ce00 __dguide_span>) at
/home/mpolacek/src/gcc/gcc/cp/pt.cc:15749
#9  0x000000000111dc2d in tsubst_function_type (t=3D<function_type
0x7fffe941c888>,=20
    args=3D<tree_vec 0x7fffe910c5f0>, complain=3D3, in_decl=3D<function_decl
0x7fffe923ce00 __dguide_span>)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:15854
#10 0x00000000011216de in tsubst (t=3D<function_type 0x7fffe941c888>,
args=3D<tree_vec 0x7fffe910c5f0>,=20
    complain=3D3, in_decl=3D<function_decl 0x7fffe923ce00 __dguide_span>)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:16727
#11 0x0000000001112526 in tsubst_function_decl (t=3D<function_decl 0x7fffe9=
23ce00
__dguide_span>,=20
    args=3D<tree_vec 0x7fffe910c5f0>, complain=3D3, lambda_fntype=3D<tree 0=
x0>,
use_spec_table=3Dfalse)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:14560
#12 0x000000000111a255 in tsubst_decl (t=3D<function_decl 0x7fffe923ce00
__dguide_span>,=20
    args=3D<tree_vec 0x7fffe910c5f0>, complain=3D3, use_spec_table=3Dfalse)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:15131
#13 0x0000000001165243 in alias_ctad_tweaks (tmpl=3D<template_decl 0x7fffe9=
41ec00
array_view>,=20
    uguides=3D<overload 0x7fffe9a571a0>) at
/home/mpolacek/src/gcc/gcc/cp/pt.cc:30380
#14 0x0000000001166b4d in deduction_guides_for (tmpl=3D<template_decl
0x7fffe941ec00 array_view>,=20
    any_dguides_p=3D@0x7fffffffb7ef: true, complain=3D3) at
/home/mpolacek/src/gcc/gcc/cp/pt.cc:30714
#15 0x0000000001167a17 in do_class_deduction (ptype=3D<template_type_parm
0x7fffe91099d8 auto>,=20
    tmpl=3D<template_decl 0x7fffe941ec00 array_view>, init=3D<constructor
0x7fffe910f000>,=20
    outer_targs=3D<tree 0x0>, flags=3D1, complain=3D3) at
/home/mpolacek/src/gcc/gcc/cp/pt.cc:30878
#16 0x0000000001168d77 in do_auto_deduction (type=3D<template_type_parm
0x7fffe91099d8 auto>,=20
    init=3D<constructor 0x7fffe910f000>, auto_node=3D<template_type_parm
0x7fffe91099d8 auto>, complain=3D3,=20
    context=3Dadc_variable_type, outer_targs=3D<tree 0x0>, flags=3D1, tmpl=
=3D<tree
0x0>)
    at /home/mpolacek/src/gcc/gcc/cp/pt.cc:31089=