https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72775
--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> --- (In reply to Matteo Bertello from comment #10) > Just had the same internal compiler error on a different piece of code, > using GCC 6.1.1 on Fedora 24. > Might be useful to investigate the cause. This code doesn't compile for me at all: r3.cc: In function ‘int main(int, char**)’: r3.cc:8:27: error: expected primary-expression before ‘(’ token auto thread = std::thread([&, =val]() { func(val); }); ^ r3.cc:8:32: error: expected identifier before ‘=’ token auto thread = std::thread([&, =val]() { func(val); }); ^ clang++ rejects it, too.