Root cause: nested cek_call_or_suspend calls on the same VM (from
synchronous callbacks like dom-listen firing handler immediately)
overwrote pending_cek before the first resume ran.
Fix: _vm_suspension_to_dict snapshots pending_cek at capture time
and restores it in the resume closure before calling resume_vm.
This ensures each suspension's CEK state is preserved regardless
of nested overwrite.
test_bytecode_repeat.js: 4/4 pass (was 3/4).
Source: 6 suspensions ✓ Bytecode: 6 suspensions ✓
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
giles
6456bd927a