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* [Bug libstdc++/81078] dynamic_cast to virtual base produces the wrong answer
[not found] <bug-81078-4@http.gcc.gnu.org/bugzilla/>
@ 2021-08-18 4:19 ` pinskia at gcc dot gnu.org
2021-08-18 14:28 ` arthur.j.odwyer at gmail dot com
1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-08-18 4:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81078
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-08-18
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Arthur O'Dwyer from comment #0)
you need to use libc++ to get the answer.
This means the RTTI is correct and it is libstdc++ issue?
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug libstdc++/81078] dynamic_cast to virtual base produces the wrong answer
[not found] <bug-81078-4@http.gcc.gnu.org/bugzilla/>
2021-08-18 4:19 ` [Bug libstdc++/81078] dynamic_cast to virtual base produces the wrong answer pinskia at gcc dot gnu.org
@ 2021-08-18 14:28 ` arthur.j.odwyer at gmail dot com
1 sibling, 0 replies; 2+ messages in thread
From: arthur.j.odwyer at gmail dot com @ 2021-08-18 14:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81078
--- Comment #3 from Arthur O'Dwyer <arthur.j.odwyer at gmail dot com> ---
Yes, this is a libstdc++ issue.
I'm not 100% sure that "the RTTI [generated by GCC] is correct," because I
don't know how to use GCC with libc++; but yeah, there's definitely at least
some problem with libstdc++ here. Observe that Clang-with-libstdc++ fails,
Clang-with-libc++ succeeds: https://godbolt.org/z/PMq6rW9cE
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <bug-81078-4@http.gcc.gnu.org/bugzilla/>
2021-08-18 4:19 ` [Bug libstdc++/81078] dynamic_cast to virtual base produces the wrong answer pinskia at gcc dot gnu.org
2021-08-18 14:28 ` arthur.j.odwyer at gmail dot com
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