[Bug c++/62155] New: ICE in tsubst_copy, at cp/pt.c:12544

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62155

            Bug ID: 62155
           Summary: ICE in tsubst_copy, at cp/pt.c:12544
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org

works on the trunk, fails on the 4.8 and 4.9 branches:

$ cat test.cc 
template <typename T> struct S {
  T i{[this] {}};
};

S<int> s;

$ /usr/lib/gcc-snapshot/bin/g++ -std=c++11 -c test.cc
test.cc:5:8: error: cannot convert '<brace-enclosed initializer list>' to 'int'
in initialization
 S<int> s;
        ^
test.cc: In constructor 'constexpr S<int>::S()':
test.cc:1:30: error: cannot convert '<brace-enclosed initializer list>' to
'int' in initialization
 template <typename T> struct S {
                              ^
test.cc: At global scope:
test.cc:5:8: note: synthesized method 'constexpr S<int>::S()' first required
here 
 S<int> s;
        ^

$ g++ -std=c++11 -c test.cc 
test.cc: In instantiation of 'struct S<int>::<lambda()>':
test.cc:1:30:   required from here
test.cc:2:8: internal compiler error: in tsubst_copy, at cp/pt.c:12544
   T i{[this] {}};
        ^
Please submit a full bug report,
with preprocessed source if appropriate.