* [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
@ 2011-03-04 0:55 ` jason at gcc dot gnu.org
2011-03-04 22:24 ` jason at gcc dot gnu.org
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From: jason at gcc dot gnu.org @ 2011-03-04 0:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-invalid-code |ice-on-valid-code
CC| |jason at gcc dot gnu.org
Known to fail| |
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-04 00:54:56 UTC ---
Same ICE on valid testcase:
template<typename T> int cmp1(T a, T b);
template<typename T> int cmp2(T a, T b);
template<typename T, int (*cmp)(T, T) = cmp1> struct A { };
template <typename T> void f (A<T> &);
void g()
{
A<char> a;
f(a);
}
though 3.4 didn't accept it, it gave the same sorry, so it isn't a big
regression.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
2011-03-04 0:55 ` [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155 jason at gcc dot gnu.org
@ 2011-03-04 22:24 ` jason at gcc dot gnu.org
2011-03-04 22:30 ` jason at gcc dot gnu.org
` (7 subsequent siblings)
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From: jason at gcc dot gnu.org @ 2011-03-04 22:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-04 22:24:30 UTC ---
Created attachment 23550
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23550
WIP patch to accept my testcase
Here's a patch that makes my testcase work. I don't want to put it in 4.6
because it produces mangling different from the EDG compiler, and want to
clarify how it should mangle first.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
2011-03-04 0:55 ` [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155 jason at gcc dot gnu.org
2011-03-04 22:24 ` jason at gcc dot gnu.org
@ 2011-03-04 22:30 ` jason at gcc dot gnu.org
2011-03-09 17:53 ` jason at gcc dot gnu.org
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From: jason at gcc dot gnu.org @ 2011-03-04 22:30 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-04 22:30:16 UTC ---
Created attachment 23551
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23551
WIP patch to make the testcase sorry as before
And here's a patch that just restores the previous sorry behavior. Do you
think it's worth applying this to 4.6?
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2011-03-04 22:30 ` jason at gcc dot gnu.org
@ 2011-03-09 17:53 ` jason at gcc dot gnu.org
2011-03-09 17:58 ` jason at gcc dot gnu.org
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From: jason at gcc dot gnu.org @ 2011-03-09 17:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ABI
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org
|gnu.org |
--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-09 17:52:53 UTC ---
A middle ground would be to fix the bug in unify without adding mangling
support, so we get the sorry there. I guess I'll do that.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2011-03-09 17:53 ` jason at gcc dot gnu.org
@ 2011-03-09 17:58 ` jason at gcc dot gnu.org
2011-03-09 17:58 ` jason at gcc dot gnu.org
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From: jason at gcc dot gnu.org @ 2011-03-09 17:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
--- Comment #8 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-09 17:57:50 UTC ---
Author: jason
Date: Wed Mar 9 17:57:46 2011
New Revision: 170824
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170824
Log:
PR c++/44629
* pt.c (unify): An unresolved overload is a nondeduced context.
Added:
trunk/gcc/testsuite/g++.dg/template/nontype22.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3/4.4/4.5/4.6 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2011-03-09 17:58 ` jason at gcc dot gnu.org
@ 2011-03-09 17:58 ` jason at gcc dot gnu.org
2011-03-09 18:01 ` [Bug c++/44629] [4.3 " jason at gcc dot gnu.org
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From: jason at gcc dot gnu.org @ 2011-03-09 17:58 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-09 17:57:54 UTC ---
Author: jason
Date: Wed Mar 9 17:57:51 2011
New Revision: 170826
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170826
Log:
PR c++/44629
* pt.c (unify): An unresolved overload is a nondeduced context.
Added:
branches/gcc-4_5-branch/gcc/testsuite/g++.dg/template/nontype22.C
Modified:
branches/gcc-4_5-branch/gcc/cp/ChangeLog
branches/gcc-4_5-branch/gcc/cp/pt.c
branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2011-03-09 17:58 ` jason at gcc dot gnu.org
@ 2011-03-09 18:01 ` jason at gcc dot gnu.org
2011-03-09 21:53 ` bangerth at gmail dot com
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From: jason at gcc dot gnu.org @ 2011-03-09 18:01 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|4.3.6 |4.4.6
Summary|[4.3/4.4/4.5/4.6 |[4.3 Regression] ICE in
|Regression] ICE in unify, |unify, at cp/pt.c:15155
|at cp/pt.c:15155 |
--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-09 18:01:02 UTC ---
ICE fixed in 4.4, 4.5, 4.6. Not worth applying to 4.3 at this point I think.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2011-03-09 18:01 ` [Bug c++/44629] [4.3 " jason at gcc dot gnu.org
@ 2011-03-09 21:53 ` bangerth at gmail dot com
2011-03-10 2:48 ` jason at gcc dot gnu.org
2011-03-10 4:28 ` bangerth at gmail dot com
9 siblings, 0 replies; 10+ messages in thread
From: bangerth at gmail dot com @ 2011-03-09 21:53 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
Wolfgang Bangerth <bangerth at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bangerth at gmail dot com
--- Comment #12 from Wolfgang Bangerth <bangerth at gmail dot com> 2011-03-09 21:52:52 UTC ---
(In reply to comment #4)
> template<typename T> int cmp1(T a, T b);
> template<typename T> int cmp2(T a, T b);
> template<typename T, int (*cmp)(T, T) = cmp1> struct A { };
I'm confused why this would be an overload set. cmp1 is a template so I
can't see how this code would even begin to be valid without specifying
the template argument in the default argument...
W.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (7 preceding siblings ...)
2011-03-09 21:53 ` bangerth at gmail dot com
@ 2011-03-10 2:48 ` jason at gcc dot gnu.org
2011-03-10 4:28 ` bangerth at gmail dot com
9 siblings, 0 replies; 10+ messages in thread
From: jason at gcc dot gnu.org @ 2011-03-10 2:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-10 02:48:48 UTC ---
(In reply to comment #12)
> I'm confused why this would be an overload set. cmp1 is a template so I
> can't see how this code would even begin to be valid without specifying
> the template argument in the default argument...
Once you know A's T, you have a desired type int (*)(T, T) from which to
determine which specialization of the template to use.
^ permalink raw reply [flat|nested] 10+ messages in thread* [Bug c++/44629] [4.3 Regression] ICE in unify, at cp/pt.c:15155
[not found] <bug-44629-4@http.gcc.gnu.org/bugzilla/>
` (8 preceding siblings ...)
2011-03-10 2:48 ` jason at gcc dot gnu.org
@ 2011-03-10 4:28 ` bangerth at gmail dot com
9 siblings, 0 replies; 10+ messages in thread
From: bangerth at gmail dot com @ 2011-03-10 4:28 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44629
--- Comment #14 from Wolfgang Bangerth <bangerth at gmail dot com> 2011-03-10 04:27:49 UTC ---
(In reply to comment #13)
> Once you know A's T, you have a desired type int (*)(T, T) from which to
> determine which specialization of the template to use.
Hm, I agree that the type could be deduced. I could nevertheless
have sworn that this should be invalid:
..........................
template <typename T> int cmp1(T a, T b);
int (*cmp)(int, int) = cmp1;
...........................
But it compiles in fact.
I had no idea a template name could be implicitly instantiated in this
context. Thanks for educating me!
Best
W.
^ permalink raw reply [flat|nested] 10+ messages in thread