[Bug c++/56135] New: [c++11] this incorrectly captured as null in template member function

[Bug c++/56135] New: [c++11] this incorrectly captured as null in template member function

[arnetheduck at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

             Bug #: 56135
           Summary: [c++11] this incorrectly captured as null in template
                    member function
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: arnetheduck@gmail.com


Created attachment 29298
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29298
Test case showing broken capture of this

When creating a lambda function in a template member function, when capturing
this using [=], this is not captured correctly when the lambda only calls
another template member function reusing the outer template argument.

Qualifying the call with this or not passing on the outer template argument
solves the issue.

In the attached code, I expect this to be captured in all 4 cases, but the
"broken" captures null resulting in the print out:

./test
(nil)
0x7fff1354f2af
0x7fff1354f2af
0x7fff1354f2af

GDB shows the same - this has been captured but with null as value.

clang 3.2 captures this as expected.

[Bug c++/56135] [c++11] this incorrectly captured as null in template member function

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-01-29
     Ever Confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-01-29 10:56:02 UTC ---
Probably Dup of PR54403.

[Bug c++/56135] [c++11] this incorrectly captured as null in template member function

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

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                     |

[Bug c++/56135] [c++11] this incorrectly captured as null in template member function

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2013-02-13 17:56:11 UTC ---
Author: jason
Date: Wed Feb 13 17:56:05 2013
New Revision: 196021

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196021
Log:
    PR c++/56135
    * pt.c (tsubst_copy_and_build): Don't forget any new
    captures that arose from use of dependent names.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-this8.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/pt.c

[Bug c++/56135] [c++11] this incorrectly captured as null in template member function

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

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> 2013-02-14 23:29:27 UTC ---
Fixed for 4.8.0.

[Bug c++/56135] [c++11] this incorrectly captured as null in template member function

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2013-02-15 18:31:41 UTC ---
Author: jason
Date: Fri Feb 15 18:31:28 2013
New Revision: 196085

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196085
Log:
    PR c++/56135
    * pt.c (tsubst_copy_and_build): Don't forget any new
    captures that arose from use of dependent names.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-this8.C
Modified:
    branches/gcc-4_7-branch/gcc/cp/ChangeLog
    branches/gcc-4_7-branch/gcc/cp/pt.c

[Bug c++/56135] [c++11] this incorrectly captured as null in template member function

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56135

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.8.0                       |4.7.3

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2013-02-15 18:35:34 UTC ---
... and 4.7.3.