[Bug c++/20148] New: [4.0 regression] Hosed error message with statement expression

["reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

The diagnostic for the following invalid code snippet is hosed on mainline
(this only affects the C++ frontend):

==========================
void foo()
{
    if (({int c[2];})) ;
}
==========================

bug.cc: In function 'void foo()':
bug.cc:3: error: could not convert '{#'decl_expr' not supported by
dump_expr#<expression error>}' to 'bool'

Older versions handle this correctly:

bug.cc: In function `void foo()':
bug.cc:3: error: could not convert `({...})' to `bool'

-- 
           Summary: [4.0 regression] Hosed error message with statement
                    expression
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: diagnostic, monitored
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20148