[Bug c++/121677] Lambda implementation leaks out to user code

[csaba_22 at yahoo dot co.uk via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121677

--- Comment #3 from Csaba Ráduly <csaba_22 at yahoo dot co.uk> ---
(In reply to Jonathan Wakely from comment #2)
> Your code has undefined behaviour because you're using a reserved identifier.

Thanks. Now at least I can tell my colleague why he shouldn't have written
that.