cstage cmd/w6c/cgen.c gained the missing N_DOT N_INDEX-lhs branch. Covers both [N]*Struct and [N]Struct via fldloadop. wwstage already handled [N]*Struct since 7c75dd2; refactored to mirror cstage exactly and added [N]Struct. The spill workaround in dotchainresolve stays (Pike rule); task #14 retires it as a follow-up. Wwstage cgassign N_DOT(N_INDEX,...) silent store-drop discovered in scope, filed as task #16.