[Bug c++/44366] New: g++ crashes when declaring a lambda expression using a typedef'd decltype.

[Bug c++/44366] New: g++ crashes when declaring a lambda expression using a typedef'd decltype.

[LindleyF at gmail dot com]

In the minimal example (to be attached), g++ crashes with a "please submit bug
report" message.

The goal of the original code was to provide a generic multi-label connected
component algorithm. Therefore, I wished to output a label along with each
Component of the same type as the input data 2d array----decltype(data[0][0]).

However, when I added a lambda expression as part of operating on something
related to this type, g++ began crashing during compile.

I realize that in some cases decltype(data[0][0]) may have a reference type so
this code may be invalid; however, the compiler still should not crash, but
simply report an error.


-- 
           Summary: g++ crashes when declaring a lambda expression using a
                    typedef'd decltype.
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: LindleyF at gmail dot com
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[LindleyF at gmail dot com]

------- Comment #1 from LindleyF at gmail dot com  2010-06-01 14:20 -------
Created an attachment (id=20796)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20796&action=view)
g++ -std=c++0x -o test2 test2.cpp -g -save-temps -v &> gcclog.txt

Build log generated by
g++ -std=c++0x -o test2 test2.cpp -g -save-temps -v &> gcclog.txt


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[LindleyF at gmail dot com]

------- Comment #2 from LindleyF at gmail dot com  2010-06-01 14:20 -------
Created an attachment (id=20797)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20797&action=view)
Preprocessed file

Preprocessor output for the small test case.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[LindleyF at gmail dot com]

------- Comment #3 from LindleyF at gmail dot com  2010-06-01 14:22 -------
Created an attachment (id=20798)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20798&action=view)
Small test case

Small test case file.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[paolo dot carlini at oracle dot com]

-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-01 17:04:39
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[paolo dot carlini at oracle dot com]

------- Comment #4 from paolo dot carlini at oracle dot com  2010-06-03 16:40 -------
Let's CC Jason...


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jason at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-06-01 17:04:39         |2010-06-07 23:57:51
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

------- Comment #5 from jason at gcc dot gnu dot org  2010-06-08 00:07 -------
This actually isn't lambda-specific.  The same crash happens with

template <typename T>
void f(T t, decltype(*t))
{
  struct A { void g() { foo; } };
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

------- Comment #7 from jason at gcc dot gnu dot org  2010-06-08 04:34 -------
Subject: Bug 44366

Author: jason
Date: Tue Jun  8 04:34:20 2010
New Revision: 160421

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160421
Log:
        PR c++/44366
        * error.c (dump_simple_decl): Don't print the scope of a
        PARM_DECL.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/g++.dg/cpp0x/decltype23.C
Modified:
    branches/gcc-4_5-branch/gcc/cp/ChangeLog
    branches/gcc-4_5-branch/gcc/cp/error.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

------- Comment #6 from jason at gcc dot gnu dot org  2010-06-08 04:34 -------
Subject: Bug 44366

Author: jason
Date: Tue Jun  8 04:33:50 2010
New Revision: 160420

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160420
Log:
        PR c++/44366
        * error.c (dump_parameters): Mask out TFF_SCOPE.
        (dump_simple_decl): Don't print the scope of a PARM_DECL.
        (dump_scope): Remove no-op mask.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/decltype23.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/error.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.5.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

------- Comment #8 from jason at gcc dot gnu dot org  2010-06-08 04:37 -------
Or even:

template <typename T>
void f(T t, int(*)[sizeof(t)])
{
  struct A { void g() {
    foo;                                            
  } };
}

which makes this a regression against 3.2.


-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366

[Bug c++/44366] [C++0x] g++ crashes when declaring a lambda expression using a typedef'd decltype.

[jason at gcc dot gnu dot org]

------- Comment #9 from jason at gcc dot gnu dot org  2010-06-09 15:12 -------
Subject: Bug 44366

Author: jason
Date: Wed Jun  9 15:11:42 2010
New Revision: 160483

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160483
Log:
        PR c++/44366
        * g++.dg/cpp0x/decltype23.C: Move to...
        * g++.dg/diagnostic/parm1.C: ...here, and remove decltype.

Added:
    trunk/gcc/testsuite/g++.dg/diagnostic/
    trunk/gcc/testsuite/g++.dg/diagnostic/parm1.C
      - copied, changed from r160478,
trunk/gcc/testsuite/g++.dg/cpp0x/decltype23.C
Removed:
    trunk/gcc/testsuite/g++.dg/cpp0x/decltype23.C
Modified:
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44366