Hojun-Cho
7e19d282f4
A widening sub-union cast (return/let `v: inner` into a union whose member is the nested `inner`) skipped the nested widen arm and emitted tag=0 (a 2nd-variant value returned the wrong payload). cstage loud-stops #35; wwstage now matches: cgwidentaggedstorebp louds on the subset cast, and cgreturn routes genuine-widening tagged returns (rhs TY_TAGGED, ru1!=fu1) through the widener choke-point so the same loud fires. Same-type returns stay on the proven passthrough. Faithful inner-tag->outer-index remap deferred. test/wcc/835 S1 row.