Two fixes:
1. HO forms (map/filter/for-each/reduce): registered as Python
primitives so compiler emits OP_CALL_PRIM (direct dispatch to
OCaml primitive) instead of OP_CALL (which routed through CEK
HO special forms and failed on NativeFn closure args).
2. Mutable closures: locals captured by closures now share an
upvalue_cell. OP_LOCAL_GET/SET check frame.local_cells first —
if the slot has a shared cell, read/write through it. OP_CLOSURE
creates or reuses cells for is_local=1 captures. Both parent
and closure see the same mutations.
Frame type extended with local_cells hashtable for captured slots.
40/40 tests pass:
- 12 compiler output tests
- 18 VM execution tests (arithmetic, control flow, closures,
nested let, higher-order, cond, string ops)
- 10 auto-compile pattern tests (recursive, map, filter,
for-each, mutable closures, multiple closures, type dispatch)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
