giles 3598a34e3d Add failing tests: set! in named let loop (WASM + native OCaml) ...

Named let creates a loop continuation but set! inside the loop body
does not mutate bindings in the enclosing let scope. Affects both
the WASM kernel and native OCaml CEK evaluator.

6 failing Node tests cover:
- set! counter (simplest case)
- set! counter with named let params
- set! list accumulator via append
- append! + set! counter combo
- set! string concatenation
- nested named let set!

3 baselines pass: plain let set!, functional named let, plain append!

Also adds spec/tests/test-named-let-set.sx (7 assertions, first
fails and aborts — confirms bug exists in spec test suite too).

This is the root cause of empty source code blocks on all example
pages: tokenize-sx uses set! in named let → empty tokens →
highlight returns "(<> )" → empty <code> blocks.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-31 17:57:45 +00:00

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