[Bug c++/58627] [4.9 Regression] crash during compilation of boost testsuite

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58627

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 31407
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31407&action=edit
gcc49-pr58627.patch

Untested fix.