# Session save — 2026-09-22 (m2compiler-V3, hardening)

## Where we are

HEAD: `v3-step3.7` (`f01bc4b`), suite **68/68** (32 run — incl.
4 trap-aborts — + 36 reject). Build warning-free (only the
known-benign Coco TypeBlock LL(1) advisory). Tree clean except
untracked `git.txt` (push recipe, intentional). No remote.

## What happened this session

Resumed after repeated continue-requests with a full baseline
check (64/64 confirmed), then ran the hardening pass prescribed
by `docs/blaise-phases-map.md`:

1. **Real bug**: `BoundPair` outer `IF` missing `END` in
   `M2.atg` — gm2 warned, still built, bug rode along since
   3.1. One-`END` fix; `M2.lst` regenerated (line-shift churn
   only, verified).
2. **4 new tests**: `t_charbounds` → 3, `t_bad_varbound` → 230,
   `t_bad_manydims` → 230, `t_trap_emptystr` → abort. One
   expectation corrected on review (2+1=3, compiler was right).
3. **Strays removed**: `compiler/src/essai` + `essai.mod`
   (scratch + linked binary). Root cause of its failure:
   trailing `;` before `END` (strict Wirth `StatSeq`).
4. Audit confirmed set-narrowing, deep-copy, `WITH` stacking
   already covered — no duplicate tests added.

Full record: `docs/summary_step3.7.md`.

## Tag lineage (append)

- `v3-step3.6` (64/64) → `v3-step3.7` (68/68, hardening)
- Docs commits untagged between, per convention.

## Next (unchanged)

Step 4 calls (C-ABI probes first): call emission, frames,
value/`VAR` params, nested/display, DEFINITION/IMPLEMENTATION +
opaque completion, `HIGH`/`LEN`, procedure-type vars. Then
step 5 stdlib. Deferred list unchanged (see 2026-09-20 save).

## Resume commands

```sh
cd /home/eric/Projets/Projets-Modula2/MyWork/m2compiler-V3/compiler
./build.sh && ./run_tests.sh   # expect 68/68, zero gm2 warnings
```