[Bug c++/56947] New: [4.7.3 regression] Bogus 'XX' was not declared in this scope

["ppluzhnikov at google dot com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56947

             Bug #: 56947
           Summary: [4.7.3 regression] Bogus 'XX' was not declared in this
                    scope
    Classification: Unclassified
           Product: gcc
           Version: 4.7.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: ppluzhnikov@google.com


This is a recent gcc-4_7-branch regression.

The case builds with trunk (r197936), fails with 4.7 branch (r197941):


struct A
{
    A (int);
};

template < typename >
void Fn ()
{
    const int kCapacity = 0;
    struct Q:A
    {
        Q ():A (kCapacity) { }
    };
    Q q;
}
template void Fn < int >();


$ trunk/bin/g++ -c t.cc && echo ok
ok

$ 4.7/bin/g++ -c t.cc
t.cc: In instantiation of ‘Fn()::Q::Q() [with <template-parameter-1-1> = int]’:
t.cc:14:7:   required from ‘void Fn() [with <template-parameter-1-1> = int]’
t.cc:16:26:   required from here
t.cc:12:26: error: ‘kCapacity’ was not declared in this scope
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From: "wbrana at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/54078] Bytemark 46% bigger binary with -flto
Date: Sat, 13 Apr 2013 16:43:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?idT078

--- Comment #5 from wbrana <wbrana at gmail dot com> 2013-04-13 16:43:10 UTC ---
branch 4.9

without lto
101462 bytes

with -flto -fwhole-program
157243 bytes - linker bfd
155488 bytes - linker gold

other CFLAGS = -O3 -g0 -march=corei7 -fomit-frame-pointer -funroll-loops
-ffast-math -fno-PIE -fno-exceptions -fno-stack-protector