[Bug c++/51412] New: [c++0x] Broken diagnostic with invalid lambda expressions

[Bug c++/51412] New: [c++0x] Broken diagnostic with invalid lambda expressions

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51412

             Bug #: 51412
           Summary: [c++0x] Broken diagnostic with invalid lambda
                    expressions
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: reichelt@gcc.gnu.org


A broken diagnostic is generated for the following invalid code snippet since
GCC 4.5.0:

==========================
void foo(int);

template<int> void bar()
{
  foo([]{}...);
}
==========================

bug.cc: In function 'void bar()':
bug.cc:5:11: error: expansion pattern '#'lambda_expr' not supported by
dump_expr#<expression error>' contains no argument packs

A slightly modified testcase results in a similar diagnostic:

==========================
void foo(int);

template<int> void bar()
{
  foo([]{}=0 ...);
}
==========================

bug.cc: In function 'void bar()':
bug.cc:5:14: error: expansion pattern '(#'lambda_expr' not supported by
pp_c_expression#)=0' contains no argument packs

[Bug c++/51412] [c++0x] Broken diagnostic with invalid lambda expressions

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51412

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-08-24
     Ever Confirmed|0                           |1
      Known to fail|                            |4.7.1, 4.8.0

[Bug c++/51412] [c++0x] Broken diagnostic with invalid lambda expressions

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51412

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |paolo.carlini at oracle dot
                   |gnu.org                     |com

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-05 17:14:38 UTC ---
Seems easy.

[Bug c++/51412] [c++0x] Broken diagnostic with invalid lambda expressions

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51412

--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2013-03-08 22:37:10 UTC ---
Author: paolo
Date: Fri Mar  8 22:37:04 2013
New Revision: 196563

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196563
Log:
/cp
2013-03-08  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/51412
    * cxx-pretty-print.c (pp_cxx_expression): Handle LAMBDA_EXPR.
    * error.c (dump_expr): Likewise.

/testsuite
2013-03-08  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/51412
    * g++.dg/cpp0x/lambda/lambda-err3.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-err3.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cxx-pretty-print.c
    trunk/gcc/cp/error.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/51412] [c++0x] Broken diagnostic with invalid lambda expressions

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51412

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.8.0

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-03-08 22:38:28 UTC ---
Fixed for 4.8.0.