[Bug 1338254] Re: internal error on lambda as argument

[Victor-Nicolae Savu]

The source code compiles and works as expected if I explicitly make S::i
to be of type int and S to be non-template:

struct S
{
    int i{42};
....
};

int main()
{
   S i;
...
}

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https://bugs.launchpad.net/bugs/1338254

Title:
  internal error on lambda as argument

Status in “gcc-4.8” package in Ubuntu:
  New

Bug description:
  1) The release of Ubuntu I am using:

  $ lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  2) The package version:

  $ apt-cache policy g++
  g++:
    Installed: 4:4.8.2-1ubuntu6
    Candidate: 4:4.8.2-1ubuntu6
    Version table:
   *** 4:4.8.2-1ubuntu6 0
          500 http://ch.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  
  3) What I expected to happen:

  I expected the source file "test.cc" to compile correctly, using the
  compiler command:

  g++ -std=c++1y test.cc

  4) What happened instead:

  Compiler output:

  test.cc: In instantiation of ‘struct S<int>::__lambda0’:
  test.cc:15:8:   required from here
  test.cc:18:8: internal compiler error: in tsubst_copy, at cp/pt.c:12125
     B b{[this]() { foo(); }};
          ^
  Please submit a full bug report,
  with preprocessed source if appropriate.
  See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
  Preprocessed source stored into /tmp/ccgECJVP.out file, please attach this to your bugreport.

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