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* [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list
@ 2012-11-07 13:37 breakpoint at f5soft dot com
2012-11-07 13:46 ` [Bug c++/55232] " paolo.carlini at oracle dot com
` (10 more replies)
0 siblings, 11 replies; 12+ messages in thread
From: breakpoint at f5soft dot com @ 2012-11-07 13:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Bug #: 55232
Summary: [C++0x] Compilation fails if expanding function param
pack in initializer_list
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: breakpoint@f5soft.com
Compilation of following source code gives error message:
"Compiling: main.cpp
'
in dependent_type_p, at cp/pt.c:19321"
Source code:
#include <vector>
#include <list>
using namespace std;
template< class... T >
struct X : T...
{
void push_back( typename T::value_type ... vals )
{
initializer_list<int> li = { (T::push_back(vals), 1)... }; //Fail
}
};
int main()
{
X< vector<double>, list<int> > x;
x.push_back(1.1, 2);
return 0;
}
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++0x] Compilation fails if expanding function param pack in initializer_list
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
@ 2012-11-07 13:46 ` paolo.carlini at oracle dot com
2012-11-07 13:52 ` [Bug c++/55232] [C++11] " redi at gcc dot gnu.org
` (9 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-07 13:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Known to work| |4.7.2, 4.8.0
Resolution| |WORKSFORME
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-07 13:45:57 UTC ---
I can't reproduce this, not even on stock 4.7.0 or current 4_5-branch and
4_6-branch.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] Compilation fails if expanding function param pack in initializer_list
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
2012-11-07 13:46 ` [Bug c++/55232] " paolo.carlini at oracle dot com
@ 2012-11-07 13:52 ` redi at gcc dot gnu.org
2012-11-07 13:54 ` redi at gcc dot gnu.org
` (8 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: redi at gcc dot gnu.org @ 2012-11-07 13:52 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|RESOLVED |NEW
Last reconfirmed| |2012-11-07
Known to work|4.7.2, 4.8.0 |
Resolution|WORKSFORME |
Summary|[C++0x] Compilation fails |[C++11] Compilation fails
|if expanding function param |if expanding function param
|pack in initializer_list |pack in initializer_list
Ever Confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-07 13:52:34 UTC ---
It only fails with warnings enabled.
Reduced:
struct vector
{
typedef double value_type;
int push_back() { return 0; }
};
template< class... T >
struct X : T...
{
void push_back( typename T::value_type ... vals )
{
int li[] = { T::push_back()... }; //Fail
}
};
int main()
{
X< vector > x;
x.push_back(2);
return 0;
}
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] Compilation fails if expanding function param pack in initializer_list
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
2012-11-07 13:46 ` [Bug c++/55232] " paolo.carlini at oracle dot com
2012-11-07 13:52 ` [Bug c++/55232] [C++11] " redi at gcc dot gnu.org
@ 2012-11-07 13:54 ` redi at gcc dot gnu.org
2012-11-07 14:00 ` paolo.carlini at oracle dot com
` (7 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: redi at gcc dot gnu.org @ 2012-11-07 13:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, ice-checking
Known to fail| |4.8.0
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-07 13:54:43 UTC ---
ICE caused by -Wunused with --enable-checking
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] Compilation fails if expanding function param pack in initializer_list
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (2 preceding siblings ...)
2012-11-07 13:54 ` redi at gcc dot gnu.org
@ 2012-11-07 14:00 ` paolo.carlini at oracle dot com
2012-11-07 14:03 ` redi at gcc dot gnu.org
` (6 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-07 14:00 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-07 14:00:12 UTC ---
Actually is the -Wunused alone which makes the difference, not the
--enable-checking. Weird, must be due to diagnostics reentered. Weird.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] Compilation fails if expanding function param pack in initializer_list
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (3 preceding siblings ...)
2012-11-07 14:00 ` paolo.carlini at oracle dot com
@ 2012-11-07 14:03 ` redi at gcc dot gnu.org
2012-11-07 14:08 ` [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name redi at gcc dot gnu.org
` (5 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: redi at gcc dot gnu.org @ 2012-11-07 14:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-07 14:03:40 UTC ---
Specifically, -Wunused-parameter
struct vector
{
typedef int value_type;
};
template< class... T >
struct X
{
void push_back( typename T::value_type ... vals )
{
}
};
int main()
{
X< vector > x;
x.push_back( 0 );
}
'
in dependent_type_p, at cp/pt.c:19250
}
^
0x56ee10 dependent_type_p
../../gcc-4.8-20121104/gcc/cp/pt.c:19250
0x56f744 dependent_scope_p(tree_node*)
../../gcc-4.8-20121104/gcc/cp/pt.c:19281
0x5391f9 make_typename_type(tree_node*, tree_node*, tag_types, int)
../../gcc-4.8-20121104/gcc/cp/decl.c:3273
0x5948f9 tsubst
../../gcc-4.8-20121104/gcc/cp/pt.c:11546
0x5948f9 tsubst
../../gcc-4.8-20121104/gcc/cp/pt.c:10950
0x60360c dump_template_bindings
../../gcc-4.8-20121104/gcc/cp/error.c:325
0x5fc5ff dump_function_decl
../../gcc-4.8-20121104/gcc/cp/error.c:1441
0x605e9c decl_to_string
../../gcc-4.8-20121104/gcc/cp/error.c:2688
0x605e9c cp_printer
../../gcc-4.8-20121104/gcc/cp/error.c:3278
0x605e9c cp_printer
../../gcc-4.8-20121104/gcc/cp/error.c:3245
0xf2f5c8 pp_base_format(pretty_print_info*, text_info*)
../../gcc-4.8-20121104/gcc/pretty-print.c:509
0xf3059f pp_base_format_verbatim(pretty_print_info*, text_info*)
../../gcc-4.8-20121104/gcc/pretty-print.c:565
0xf30687 pp_verbatim(pretty_print_info*, char const*, ...)
../../gcc-4.8-20121104/gcc/pretty-print.c:749
0x5f82a1 print_instantiation_full_context
../../gcc-4.8-20121104/gcc/cp/error.c:3053
0x5f82a1 maybe_print_instantiation_context
../../gcc-4.8-20121104/gcc/cp/error.c:3193
0x5f82a1 maybe_print_instantiation_context
../../gcc-4.8-20121104/gcc/cp/error.c:3187
0x6047c5 cp_diagnostic_starter
../../gcc-4.8-20121104/gcc/cp/error.c:2881
0xf2cfc8 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc-4.8-20121104/gcc/diagnostic.c:757
0xf2e3e5 warning(int, char const*, ...)
../../gcc-4.8-20121104/gcc/diagnostic.c:918
0x8e7864 do_warn_unused_parameter(tree_node*)
../../gcc-4.8-20121104/gcc/function.c:4965
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (4 preceding siblings ...)
2012-11-07 14:03 ` redi at gcc dot gnu.org
@ 2012-11-07 14:08 ` redi at gcc dot gnu.org
2012-11-07 14:08 ` redi at gcc dot gnu.org
` (4 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: redi at gcc dot gnu.org @ 2012-11-07 14:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-checking |
Known to work| |4.7.3
Summary|[C++11] Compilation fails |[C++11] ICE with
|if expanding function param |-Wunused-parameter for
|pack in initializer_list |unused parameter pack using
|with -Wunused |qualified dependent name
Known to fail| |4.5.2, 4.6.3, 4.7.1
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-07 14:07:56 UTC ---
It isn't related to initializer lists, see my last reduction, summary adjusted
4.7.3 seems to work, which is why I thought it depended on --enable-checking
(my 4.7. has checking disabled)
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (5 preceding siblings ...)
2012-11-07 14:08 ` [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name redi at gcc dot gnu.org
@ 2012-11-07 14:08 ` redi at gcc dot gnu.org
2012-11-07 14:21 ` paolo.carlini at oracle dot com
` (3 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: redi at gcc dot gnu.org @ 2012-11-07 14:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-07 14:08:42 UTC ---
4.7.3 gives:
t.cc: In instantiation of 'void X<T>::push_back(typename T::value_type ...)
[with T = {vector}; typename T::value_type = <type error>]':
t.cc:17:20: required from here
t.cc:9:10: warning: unused parameter 'vals#0' [-Wunused-parameter]
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (6 preceding siblings ...)
2012-11-07 14:08 ` redi at gcc dot gnu.org
@ 2012-11-07 14:21 ` paolo.carlini at oracle dot com
2013-02-14 14:03 ` jason at gcc dot gnu.org
` (2 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: paolo.carlini at oracle dot com @ 2012-11-07 14:21 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|4.7.3 |
--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-07 14:20:48 UTC ---
Current 4_7-branch also ICEs.
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (7 preceding siblings ...)
2012-11-07 14:21 ` paolo.carlini at oracle dot com
@ 2013-02-14 14:03 ` jason at gcc dot gnu.org
2013-02-15 1:26 ` jason at gcc dot gnu.org
2013-02-15 11:20 ` paolo.carlini at oracle dot com
10 siblings, 0 replies; 12+ messages in thread
From: jason at gcc dot gnu.org @ 2013-02-14 14:03 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |jason at gcc dot gnu.org
AssignedTo|unassigned at gcc dot |jason at gcc dot gnu.org
|gnu.org |
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> 2013-02-14 14:03:11 UTC ---
This test crashes with no warning flags; the crash happens when trying to print
the diagnostic context.
struct vector
{
typedef int value_type;
};
template< class U, class... T >
struct X
{
void push_back( typename T::value_type ... vals )
{
U::asoeuth;
}
};
int main()
{
X< int, vector > x;
x.push_back( 0 );
}
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (8 preceding siblings ...)
2013-02-14 14:03 ` jason at gcc dot gnu.org
@ 2013-02-15 1:26 ` jason at gcc dot gnu.org
2013-02-15 11:20 ` paolo.carlini at oracle dot com
10 siblings, 0 replies; 12+ messages in thread
From: jason at gcc dot gnu.org @ 2013-02-15 1:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> 2013-02-15 01:26:39 UTC ---
Author: jason
Date: Fri Feb 15 01:26:34 2013
New Revision: 196064
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196064
Log:
PR c++/55232
* error.c (find_typenames_r): Don't walk into a pack expansion.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/variadic-diag1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/error.c
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name
2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
` (9 preceding siblings ...)
2013-02-15 1:26 ` jason at gcc dot gnu.org
@ 2013-02-15 11:20 ` paolo.carlini at oracle dot com
10 siblings, 0 replies; 12+ messages in thread
From: paolo.carlini at oracle dot com @ 2013-02-15 11:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55232
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.8.0
--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-02-15 11:20:09 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2013-02-15 11:20 UTC | newest]
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2012-11-07 13:37 [Bug c++/55232] New: [C++0x] Compilation fails if expanding function param pack in initializer_list breakpoint at f5soft dot com
2012-11-07 13:46 ` [Bug c++/55232] " paolo.carlini at oracle dot com
2012-11-07 13:52 ` [Bug c++/55232] [C++11] " redi at gcc dot gnu.org
2012-11-07 13:54 ` redi at gcc dot gnu.org
2012-11-07 14:00 ` paolo.carlini at oracle dot com
2012-11-07 14:03 ` redi at gcc dot gnu.org
2012-11-07 14:08 ` [Bug c++/55232] [C++11] ICE with -Wunused-parameter for unused parameter pack using qualified dependent name redi at gcc dot gnu.org
2012-11-07 14:08 ` redi at gcc dot gnu.org
2012-11-07 14:21 ` paolo.carlini at oracle dot com
2013-02-14 14:03 ` jason at gcc dot gnu.org
2013-02-15 1:26 ` jason at gcc dot gnu.org
2013-02-15 11:20 ` paolo.carlini at oracle dot com
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