[2026-06 LWG Motion 3] P3798R1 The unexpected in std::expected#9127
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[2026-06 LWG Motion 3] P3798R1 The unexpected in std::expected#9127eisenwave wants to merge 2 commits into
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Co-authored-by: Jonathan Wakely <github@kayari.org>
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I've asked LWG about the Effects vs Returns question, but that can be resolved separately. This pull request matches the incoming paper, thanks.
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Fixes #9090
Also fixes cplusplus/papers#2403