EWG saw this paper in today's telecon. Minutes

There is a problem to be solved with range-based for loops and lifetime of temporaries.

A solution which might break existing code (such as the lock example Nico showed) is acceptable.

A solution which proposes a new kind of loop is worth exploring.

Adopt the wording proposed by Jens into P2012, and poll it at the next EWG quarterly polling period.

For future polls: assuming we go with Jens’ proposed wording, this is a defect going back to C++11, and want CWG to treat this as a defect report on prior Standards.

P2012R1 Fix the range-based for loop, Rev1 (Nicolai Josuttis, Victor Zverovich, Arthur O'Dwyer, Filipe Mulonde)

Seen at today's EWG telecon:

POLL: send P2012r2 to EWG electronic polling for inclusion in C++23, not as a DR.

Result: no consensus.

P2012R2 Fix the range-based for loop, Rev2 (Nicolai Josuttis, Victor Zverovich, Arthur O'Dwyer, Filipe Mulonde)

Subsumed by #1316