[Bug c++/49932] New: [C++0x] ICE on instantiating decltype(expr)::type with template

[Bug c++/49932] New: [C++0x] ICE on instantiating decltype(expr)::type with template

[flast at flast dot jp]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49932

           Summary: [C++0x] ICE on instantiating decltype(expr)::type with
                    template
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: flast@flast.jp


ICE on instantiating the following two template functions.
I tested with GCC 4.7.0 20110801.

---- 8< ----
template < typename T >
auto
f1( T x ) // ICE on here
  -> typename decltype( x )::type {}

template < typename T >
typename decltype( T{} )::type
f2( T x ) {} // ICE on here

struct S { typedef void type; };

void g()
{
    f1( S() );
    f2( S() );
}
---- 8< ----

[Bug c++/49932] [C++0x] ICE on instantiating decltype(expr)::type with template

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49932

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011.08.01 14:01:45
                 CC|                            |jason at gcc dot gnu.org
     Ever Confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-08-01 14:01:45 UTC ---
The ICE happens in the mangler, in write_prefix: decl = TREE_TYPE (node) is
NULL_TREE.

[Bug c++/49932] [C++0x] ICE on instantiating decltype(expr)::type with template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49932

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |jason at gcc dot gnu.org
                   |gnu.org                     |

[Bug c++/49932] [C++0x] ICE on instantiating decltype(expr)::type with template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49932

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2011-08-01 21:02:10 UTC ---
Author: jason
Date: Mon Aug  1 21:02:07 2011
New Revision: 177074

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177074
Log:
    PR c++/49932
gcc/cp/
    * mangle.c (write_prefix): Handle decltype.
libiberty/
    * cp-demangle.c (d_prefix): Handle decltype.

Added:
    trunk/gcc/testsuite/g++.dg/abi/mangle49.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/mangle.c
    trunk/gcc/testsuite/ChangeLog
    trunk/libiberty/ChangeLog
    trunk/libiberty/cp-demangle.c
    trunk/libiberty/testsuite/demangle-expected

[Bug c++/49932] [C++0x] ICE on instantiating decltype(expr)::type with template

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49932

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.7.0

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2011-08-02 12:59:46 UTC ---
Fixed.