The flat checker scope makes ANY decl named assert/abort anywhere in
the combined unit disable the builtin unit-wide (the #45 shadow shape:
scope_lookup_prefer's cross-module fallback finds it). lib carried
three colliding @symbol("rt_abort") shims (os, time, strconv/stof)
plus the os.assert wrapper, so a bare assert(cond) in ANY program
importing os mis-bound os.assert and failed arity — a hard blocker for
regex fold-5 (regex.ha:660/670 bring builtin-assert mass). Ruled
respell-now per the recurrence test (#45 -> #58).
Delete the shims and the os.assert wrapper; every bare abort(msg)
caller (regex, strings, utf8, hash, getopt, encoding/*, time, stof)
now lands on the builtin, and the ~40 os.assert(c, m) sites respell to
the builtin assert(c, m) — restoring the exact Hare spelling the lib
ports diverged from (e.g. ref/hare/bytes/tokenize.ha:23). os.assert
had no Hare counterpart (Hare's assert is a language builtin); rule-9
wrapper removed. temp/dirs/bufio already use the non-colliding rtabort
spelling and keep it.
Now-dead 'import os;' lines kept (pre-existing precedent:
lib/strconv/strconv.ww carries one); a tree-wide dead-import sweep is
a separate concern. regex.ww's if+abort workarounds citing #58 stay
for the fold-5 owner to fold back into assert.
combined.ww regenerated for all five selfhost tools + the smoke
fixture via make.
Add a sub-bullet to the 8-spelling-divergences list documenting two
implementation sub-cases reviewer-fold3 surfaced during the 07e57ff
decimal.ha port: (1) `i_sz` per-iteration size-cast hoist inside
leftshift_newdigits' for-loop (decimal.ww:93); (2) `lowbit_lit`
stepwise boolean decomposition in should_round_up (decimal.ww:242)
dodging ww parser precedence on Hare's `(nd > 0 && d.digits[nd - 1]
& 1 != 0)` (ref/hare/strconv/decimal.ha:158). Both are in-file
instances of the documented hoist+restructure patterns — rule-9
doc-completeness, not new divergence. Combined.ww regen for
lib/strconv (compiler-imported into w6c + wwdump + smoke) uses the
build's include paths (`-I lib/ww -I lib/ww/lex -I lib/ww/parse
-I selfhost/cmd/wcc`) for transitive import closure; bare `ww build`
without these flags produces truncated output (reviewer-32c2 +
reviewer-fold3 both hit this).
