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* [Bug c++/99675] New: internal compiler error during template deduction
@ 2021-03-19 21:55 lnwirz at chem dot helsinki.fi
2021-03-20 19:51 ` [Bug c++/99675] [11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7 marxin at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: lnwirz at chem dot helsinki.fi @ 2021-03-19 21:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99675
Bug ID: 99675
Summary: internal compiler error during template deduction
Product: gcc
Version: 10.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lnwirz at chem dot helsinki.fi
Target Milestone: ---
Created attachment 50436
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50436&action=edit
the code file, saved temps
Hi folks,
When compiling the attached (fairly) minimal example with g++-10.2.1
(debian/testing) with
g++ --std=c++17 bug1.cpp
I get
bug1.cpp: In function ‘void lala()’:
bug1.cpp:20:19: warning: alias template deduction only available with
‘-std=c++2a’ or ‘-std=gnu++2a’
20 | vec3 foo(1, 2, 3);
| ^
bug1.cpp:20:19: internal compiler error: in set_constraints, at
cp/constraint.cc:1191
0x7fcbcfa72d09 __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report,
In g++-10.2.1 as shipped by debian testing, the std=c++17 is required for the
failure. Comparing with compiler explorer (https://gcc.godbolt.org/z/d3dTff)
shows that in trunk not even the c++17 argument is required and the output is
source>: In function 'void lala()':
<source>:20:19: warning: alias template deduction only available with
'-std=c++20' or '-std=gnu++20'
20 | vec3 foo(1, 2, 3);
| ^
<source>:20:19: internal compiler error: in set_constraints, at
cp/constraint.cc:1255
0x1cfa259 internal_error(char const*, ...)
???:0
0x6ba797 fancy_abort(char const*, int, char const*)
???:0
0x73f122 set_constraints(tree_node*, tree_node*)
???:0
0x909361 do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
???:0
0x7b2164 cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
???:0
0x8e136d c_parse_file()
???:0
0xa5f962 c_common_parse_file()
???:0
Please submit a full bug report,
let me know if more information is required.
cheers, Lukas Wirz
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/99675] [11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7
2021-03-19 21:55 [Bug c++/99675] New: internal compiler error during template deduction lnwirz at chem dot helsinki.fi
@ 2021-03-20 19:51 ` marxin at gcc dot gnu.org
2021-03-22 8:53 ` [Bug c++/99675] [10/11 " rguenth at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-03-20 19:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99675
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-03-20
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Known to fail| |11.0
Summary|internal compiler error |[11 Regression] ICE during
|during template deduction |template deduction since
| |r10-5020-g1a291106384cabc7
Known to work| |10.2.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Reduced test-case:
namespace std {
template <typename> struct common_type;
template <typename... _Tp>
using common_type_t = typename common_type<_Tp...>::type;
} // namespace std
template <typename T, int> class vec {
public:
vec(T, T, T);
};
template <typename... Args>
vec() -> vec<std::common_type_t<Args...>, sizeof...(Args)>;
template <typename T> using vec3 = vec<T, 3>;
void lala() { vec3(1, 2, 3); }
started with r10-5020-g1a291106384cabc7.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/99675] [10/11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7
2021-03-19 21:55 [Bug c++/99675] New: internal compiler error during template deduction lnwirz at chem dot helsinki.fi
2021-03-20 19:51 ` [Bug c++/99675] [11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7 marxin at gcc dot gnu.org
@ 2021-03-22 8:53 ` rguenth at gcc dot gnu.org
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2021-04-10 6:20 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-03-22 8:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99675
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[11 Regression] ICE during |[10/11 Regression] ICE
|template deduction since |during template deduction
|r10-5020-g1a291106384cabc7 |since
| |r10-5020-g1a291106384cabc7
Target Milestone|--- |10.3
Priority|P3 |P2
Known to work|10.2.0 |
Known to fail| |10.2.0
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/99675] [10/11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7
2021-03-19 21:55 [Bug c++/99675] New: internal compiler error during template deduction lnwirz at chem dot helsinki.fi
2021-03-20 19:51 ` [Bug c++/99675] [11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7 marxin at gcc dot gnu.org
2021-03-22 8:53 ` [Bug c++/99675] [10/11 " rguenth at gcc dot gnu.org
@ 2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2021-04-10 6:20 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-04-08 12:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99675
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.3 |10.4
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10.3 is being released, retargeting bugs to GCC 10.4.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug c++/99675] [10/11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7
2021-03-19 21:55 [Bug c++/99675] New: internal compiler error during template deduction lnwirz at chem dot helsinki.fi
` (2 preceding siblings ...)
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
@ 2021-04-10 6:20 ` jason at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: jason at gcc dot gnu.org @ 2021-04-10 6:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99675
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed already, probably by the patch for 95486.
*** This bug has been marked as a duplicate of bug 95486 ***
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-04-10 6:20 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2021-03-19 21:55 [Bug c++/99675] New: internal compiler error during template deduction lnwirz at chem dot helsinki.fi
2021-03-20 19:51 ` [Bug c++/99675] [11 Regression] ICE during template deduction since r10-5020-g1a291106384cabc7 marxin at gcc dot gnu.org
2021-03-22 8:53 ` [Bug c++/99675] [10/11 " rguenth at gcc dot gnu.org
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2021-04-10 6:20 ` jason at gcc dot gnu.org
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