[Bug c++/90333] [9 Regression] Can't apply attributes to lambdas with trailing returns

[ttimo at valvesoftware dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90333

--- Comment #9 from Timothee Besset <ttimo at valvesoftware dot com> ---
First test case is still a problem in 9.3 and 10:

[]() __attribute__((always_inline)) -> int { return 0; }

Fix proposed in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95883