The fold-1b unified arm (bb2f4e1) added an N_IDENT addressable-rhs source
setup, but the two stages gated the GLOBAL case differently: cstage used
let_islet || def_isarraydef, wwstage used isletvar || deflookup (ANY def).
On a struct-typed `def` used as an aggregate-copy rhs (`let c: T = G`)
wwstage copied the whole value (correct) while cstage truncated to the 8B
scalar tail — a cs!=ww divergence (rule-10). A struct-LET global already
copies on both, so the def gap was also an internal cstage inconsistency.
Struct defs are first-class laid-out aggregates (DATA storage + field
load, #129 A.2/A.3), so converge on the correct full copy on both: add
def_isstructdef to cstage's predicate and replace wwstage's broad
deflookup with the def_is{array,struct}def pairing already held identical
in defisaddressable. 949 +2 rows (array-def + struct-def global, full
readback, byteid=1).
Hojun-Cho
35b517ca3e