http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59490
--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> --- Just -mtune=corei7: make check-c++ RUNTESTFLAGS="--target_board='unix{-m32\ -mtune=corei7}' cilk-plus.exp=catch_exc.cc" is sufficient to reproduce.