UFCS generic overload resolution (issue 0157 follow-ups):
- P1-a: call planning (calls.zig) used the last-wins fn_ast_map winner
while lowering reselected by receiver, so the planned result type
could disagree with the dispatched function and misbox the result.
Both now share selectUfcsGenericByReceiver(.., fd0).
- P1-b: selection scanned module_decls globally, flagging a
transitively-hidden same-named overload as a false ambiguity. Now
two-tier: directly-visible authors first (ambiguity only among
those), global fallback for receiver-reachable namespaced methods
(e.g. Task.cancel) that defers to fd0 on a hidden tie.
- P2-b: boolean specificity tied *$T with *Box($T). Now peels pointer
layers so the structurally-narrower receiver wins.
Scheduler (sched.sx):
- P1-c: a second concurrent Task.wait overwrote the single waiter slot
-> silent deadlock. Now one-awaiter-per-task loud abort.
- P2-c: sleep(negative) rewound the monotonic virtual clock. Rejected
loudly.
(P2-a, non-generic-winner-hides-generic, did not reproduce -- the
non-generic arm already falls through.)
Regressions: examples/generics/0218 (receiver specificity +
plan/lowering agreement), examples/concurrency/1818 (negative-sleep
abort), 1819 (double-wait abort). Suite green 758/0.
0156 Part 1: a single-type generic $R (parsed as comptime_pack_ref)
used as a type-arg in a pack-fn body (Box($R), size_of(Box($R))) hit a
missing arm in resolveTypeWithBindings -> .unresolved -> LLVM panic.
Fix: mirror resolveTypeArg's comptime_pack_ref arm (look up
type_bindings, else a loud diagnostic). Regression: examples/generics/0216.
(Part 2 -- deferred .. spread crashes -- reframed OPEN/non-blocking.)
0157: a user generic ufcs method whose name collides with a stdlib
re-export resolved via last-wins fn_ast_map with no receiver filtering,
so the wrong overload won, $R never bound, and .unresolved reached LLVM.
Fix: selectUfcsGenericByReceiver enumerates all module authors, keeps
the receiver-binding ones, picks the most receiver-specific (concrete >
bare $T), dedups re-exports, and flags a genuine tie as a deterministic
'ambiguous -- qualify' diagnostic. Regression: examples/generics/0217.
Move examples/*.sx and their expected/ snapshots into per-category
subfolders (examples/<category>/...). Folder = leading filename token,
with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus
runner and LSP sweep now discover each category's expected/ dir, while
issues/ stays flat. Example 1058's repo-root-relative companion import
is made file-relative. Path strings embedded in 164 snapshots were
regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.
