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scan_for_raises only flagged ON ... RAISE / EXIT actions, but the unselected-bubble path of every fallible WITH always emits rt.setError(...); return error.CheatError; for types like LockCycle / Deadlock. Functions in non-main scopes that hosted any WITH+ON clause therefore reached for an out-of-scope rt. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
WITH GUARD now supports multiple capabilities per WITH; each per-cap predicate references only its own alias (sibling-alias references are rejected with a "multi-object consistency for aliased objects is not supported" diagnostic, since synchronized sources cannot provide a cross-object atomic snapshot). Multiple per-cap GUARDs AND-combine in the lowering. MUTABLE aliases are accepted unless the body actually mutates them; mutation is recognized via the existing mark_var_mutated infrastructure, now also stamped on the SymbolEntry (aliases have no decl node) and on chained-target field/index assigns and mutating method receivers. Multi-fallible WITH (2+ EXCLUSIVE / write_locked_read) can now combine with an ON / RETRY clause. emit_sorted_lock_acquires_fallible uses the OrErr acquire variants, tracks held guards in per-cap booleans, releases held guards in reverse order on any acquisition failure, and either retries the sorted acquire from scratch or runs the user's ON action. Defers at WITH-scope are guarded by the same held-bitmap so they're safe no-ops on the failure path. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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