A joint Study Group between the C (WG14) and C++ (WG21) Committees to ensure the longterm synchronization and cooperation of the C and C++ programming languages where any mutual interests lie.
We don't have to discuss the Lambda proposals because Jens's designs are not deviating from how WG21 wants their lambdas to work in any appreciable or detectable manner. There's no compatibility risk here.
Issue tracking the SG22 discussion of P2303R0 Function literals and value closures (Jens Gustedt)
WG21 issue