The first Object.freeze, Object.seal or Object.preventExtensions of a typed
function creates its property table from the function's dynamic box. The
box had no name, so later `f.name` reads answered "". The box now carries
the function's JS name, as a closure flowing into any checked-dynamic slot
does.
The runtime's own callers (published values, os and node constants, the
private-range block list, Wasm exports) freeze data they built, and now
call scr_dyn_freeze_data, the freeze for values that are not functions.
Object.isFrozen, Object.isSealed and Object.isExtensible read a
function's existing table and answer false, false and true when it has
none. Fully typed programs therefore link no dynamic-tier object code
for these calls again.
