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* Re: c++/10223: template trickery causes ICE (segmentation fault)
@ 2003-05-02 17:36 Giovanni Bajo
0 siblings, 0 replies; 4+ messages in thread
From: Giovanni Bajo @ 2003-05-02 17:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/10223; it has been noted by GNATS.
From: "Giovanni Bajo" <giovannibajo@libero.it>
To: <gcc-gnats@gcc.gnu.org>,
<hg211@ural2.hszk.bme.hu>,
<gcc-bugs@gcc.gnu.org>,
<nobody@gcc.gnu.org>,
<gcc-prs@gcc.gnu.org>
Cc:
Subject: Re: c++/10223: template trickery causes ICE (segmentation fault)
Date: Fri, 2 May 2003 19:28:29 +0200
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10223
Not really related to c++/9364 (as shown by my recent analysys of that PR).
Instead, an epurated code snippet of this PR looks this way:
--------------------------------------------
template <typename T>
struct Foo
{
template <void (T::*)()>
struct dummy;
template <typename Q>
static char test(dummy<&Q::whatever> *);
};
struct Bar {};
template struct Foo<Bar>;
//template struct Foo<int>;
--------------------------------------------
pr10223.cpp: In instantiation of `Foo<Bar>':
pr10223.cpp:14: instantiated from here
pr10223.cpp:8: internal compiler error: Segmentation fault
Please submit a full bug report,
If you instantiate the template with a basic type instead of Bar (using the
commented line instead of the other one), we get an ICE on error recovery:
pr10223.cpp: In instantiation of `Foo<int>':
pr10223.cpp:15: instantiated from here
pr10223.cpp:5: error: creating pointer to member function of non-class type
`int'
pr10223.cpp:5: internal compiler error: in retrieve_specialization, at
cp/pt.c:894
Please submit a full bug report,
I keep both the ICEs in this same PR since they are very likely related.
Reconfirmed on every GCC version I have (2.95 -> mainline CVS 20030430).
After this redux has been fixed, I suggest trying again the original code
provided by the poster, which could reveal other problems.
Giovanni Bajo
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: c++/10223: template trickery causes ICE (segmentation fault)
@ 2003-03-27 21:56 Volker Reichelt
0 siblings, 0 replies; 4+ messages in thread
From: Volker Reichelt @ 2003-03-27 21:56 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c++/10223; it has been noted by GNATS.
From: Volker Reichelt <reichelt@igpm.rwth-aachen.de>
To: gcc-gnats@gcc.gnu.org, hg211@ural2.hszk.bme.hu, gcc-bugs@gcc.gnu.org,
bangerth@ices.utexas.edu
Cc:
Subject: Re: c++/10223: template trickery causes ICE (segmentation fault)
Date: Thu, 27 Mar 2003 22:36:29 +0100 (CET)
Hi Wolfgang,
this looks similar to PR 9634 to me.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9634
Regards,
Volker
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10223
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: c++/10223: template trickery causes ICE (segmentation fault)
@ 2003-03-26 15:28 bangerth
0 siblings, 0 replies; 4+ messages in thread
From: bangerth @ 2003-03-26 15:28 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, hg211, nobody
Synopsis: template trickery causes ICE (segmentation fault)
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Wed Mar 26 15:19:11 2003
State-Changed-Why:
Confirmed with all versions including present mainline. I'm
pretty sure this is a duplicate of some other report which
I can't find at present, though.
W.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10223
^ permalink raw reply [flat|nested] 4+ messages in thread
* c++/10223: template trickery causes ICE (segmentation fault)
@ 2003-03-26 14:56 hg211
0 siblings, 0 replies; 4+ messages in thread
From: hg211 @ 2003-03-26 14:56 UTC (permalink / raw)
To: gcc-gnats
>Number: 10223
>Category: c++
>Synopsis: template trickery causes ICE (segmentation fault)
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: unassigned
>State: open
>Class: ice-on-legal-code
>Submitter-Id: net
>Arrival-Date: Wed Mar 26 14:26:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: Geza Herman
>Release: All gcc versions
>Organization:
>Environment:
Linux 2.4.18 i686 Debian GNU/Linux
>Description:
The code sample causes ICE an all gcc versions I tried:
gcc version 2.95.4 20011002 (Debian prerelease)
gcc version 3.0.4
gcc version 3.2.3 20030316 (Debian prerelease)
gcc version 3.3 20030314 (prerelease)
The sample tries to get some meta-information: tries to determine if a class has a particular member-function.
('void save()' in this example)
>How-To-Repeat:
compile this sample:
template <typename T>
class hasSaveFunction {
private:
struct Helper {
struct False { char dummy[1979]; };
template <void (T::*)()>
struct dummy;
template <typename T2>
static char test(dummy<&T2::save> *);
template <typename T2>
static False test(...);
};
public:
static const bool value = sizeof(Helper::template test<T>(0))==1
;
};
class Dummy { };
int main() {
return hasSaveFunction<Dummy>::value;
}
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-05-02 17:36 UTC | newest]
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2003-05-02 17:36 c++/10223: template trickery causes ICE (segmentation fault) Giovanni Bajo
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2003-03-27 21:56 Volker Reichelt
2003-03-26 15:28 bangerth
2003-03-26 14:56 hg211
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