agra 2d2bfafa29 test(ir): pin both lambda arms of the error-flow pass (A5.2 scaffolding review fix) ...

Codex review of 95895a3 found 1051 reached neither lambda arm it claimed to
pin: the lambda arrived only as a var_decl initializer, which routes through
checkCleanupNode's `.var_decl` arm -> cleanupReject(lambda) -> early-return
(a lambda literal is not failable), so the `.lambda` stop never ran; and its
accepted-direction `if !err` guard would still pass with flowExpr's lambda
recursion removed.

Scaffolding-only fix (no compiler change):
- 1051: add a bare lambda STATEMENT `() -> !E { failing(); };` in the cleanup
  body so checkCleanupNode sees a `.lambda` node directly and stops (the bare
  failable inside is accepted; were the arm to recurse it would reject like
  1052). Output byte-identical — only the .sx gained the statement.
- 1053-errors-nested-lambda-liveness-reject (exit 1): an E1.8 value-slot read
  inside a never-called nested lambda, rejected only because flowExpr recurses
  via `.lambda => analyzeFnBody`. Remove that arm and the diagnostic vanishes
  -> suite fails. This is the discriminating negative 1051 lacked.

Gate: zig build test, bash tests/run_examples.sh -> 361/0.

2026-06-03 06:42:51 +03:00

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