[Bug c++/89640] [9 Regression] g++ chokes on lambda with __attribute__

[ttimo at valvesoftware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89640

--- Comment #13 from Timothee Besset <ttimo at valvesoftware dot com> ---
Fix proposed in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95883