The witness skipped every libCall whose signature result is VOID. VOID is
also the signature of runtime calls that take their record type from the
use site and build the record at run time, such as net.serverAddress
(`server.address()`). A literal of the same shape then set the shape's key
order, and the runtime record enumerated in the literal's order instead of
Node's (`port, family, address` for `address, family, port`).
The witness now skips only the calls in ALWAYS_THROW_LIB_FNS, which never
produce a value. The set moves from validate.ts's result-type check to
builtin-effects.ts, and both use it.
Chris Tate
c43d4002e7