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* [Bug c++/96510] New: Unexpected constexpr deallocation error after implicit conversion
@ 2020-08-06 23:29 pkeir at outlook dot com
2020-08-29 1:07 ` [Bug c++/96510] " johelegp at gmail dot com
2021-12-08 8:29 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: pkeir at outlook dot com @ 2020-08-06 23:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96510
Bug ID: 96510
Summary: Unexpected constexpr deallocation error after implicit
conversion
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pkeir at outlook dot com
Target Milestone: ---
Created attachment 49012
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49012&action=edit
A C++ file containing the code described.
In the C++20 code below (also attached), the Foo class allocates and
deallocates to an int pointer member in the constructor and destructor
respectively. Comparing a Foo object to an integer (via `operator==`) makes use
of another member function `compare` which expects a `Foo&`; and so a `Foo`
object is implicitly created. Somehow, within a `constexpr` context (e.g. the
`static_assert` below), the `constexpr` memory is not being freed, and an error
message is issued (error: ‘do_stuff()’ is not a constant expression because
allocated storage has not been deallocated).
struct Foo {
constexpr Foo(int i) { p = new int(i); }
constexpr ~Foo() { delete p; }
constexpr bool compare(const Foo&) const { return true; }
constexpr bool operator==(int y) const { return compare(y); }
int *p;
};
constexpr bool do_stuff()
{
Foo f(0);
bool b = f == 42;
return b;
}
int main(int argc, char *argv[])
{
static_assert(do_stuff());
return do_stuff() ? 0 : -1;
}
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/96510] Unexpected constexpr deallocation error after implicit conversion
2020-08-06 23:29 [Bug c++/96510] New: Unexpected constexpr deallocation error after implicit conversion pkeir at outlook dot com
@ 2020-08-29 1:07 ` johelegp at gmail dot com
2021-12-08 8:29 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: johelegp at gmail dot com @ 2020-08-29 1:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96510
Johel Ernesto Guerrero Peña <johelegp at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |johelegp at gmail dot com
--- Comment #1 from Johel Ernesto Guerrero Peña <johelegp at gmail dot com> ---
This may be related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95977.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/96510] Unexpected constexpr deallocation error after implicit conversion
2020-08-06 23:29 [Bug c++/96510] New: Unexpected constexpr deallocation error after implicit conversion pkeir at outlook dot com
2020-08-29 1:07 ` [Bug c++/96510] " johelegp at gmail dot com
@ 2021-12-08 8:29 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-08 8:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96510
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.3
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=95977,
| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=99705
Resolution|--- |FIXED
Status|UNCONFIRMED |RESOLVED
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 10.3.0, most likely by the patch which fixed PR 99705 (similar to
PR 95977 ).
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-12-08 8:29 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-08-06 23:29 [Bug c++/96510] New: Unexpected constexpr deallocation error after implicit conversion pkeir at outlook dot com
2020-08-29 1:07 ` [Bug c++/96510] " johelegp at gmail dot com
2021-12-08 8:29 ` pinskia at gcc dot gnu.org
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