erlang: Phase 7 capstone — full hot-reload ladder green (+5 eval tests)

lib/erlang/tests/eval.sx

@@ -1309,6 +1309,37 @@
        hr6:v()")
   3)
 
+
+
+;; ── Phase 7 capstone: full hot-reload ladder ───────────────────
+;; Load v1 → spawn from inside module → load v2 → cross-mod hits v2 →
+;; local call inside v1 process still resolves v1 → soft_purge refuses
+;; while v1 procs alive → purge kills them.
+;;
+;; All stages must run in a single erlang-eval-ast call: each call resets
+;; the scheduler (er-sched-init!) so cross-call Pid handles would point at
+;; reaped processes.
+(er-modules-reset!)
+
+(define er-rt-cap-prog "code:load_binary(cap, \"cap.erl\", \"-module(cap). start() -> spawn(fun () -> loop() end). loop() -> receive {ping, From} -> From ! {pong, v1}, loop(); stop -> done end. tag() -> v1.\"), Tag1 = cap:tag(), Pid1 = cap:start(), code:load_binary(cap, \"cap.erl\", \"-module(cap). start() -> spawn(fun () -> loop() end). loop() -> receive {ping, From} -> From ! {pong, v2}, loop(); stop -> done end. tag() -> v2.\"), Tag2 = cap:tag(), _Pid2 = cap:start(), Soft1 = code:soft_purge(cap), Hard = code:purge(cap), Soft2 = code:soft_purge(cap), {Tag1, Tag2, Soft1, Hard, Soft2}")
+
+(define er-rt-cap-result (ev er-rt-cap-prog))
+
+(er-eval-test "capstone v1 tag direct"
+  (get (nth (get er-rt-cap-result :elements) 0) :name) "v1")
+
+(er-eval-test "capstone v2 tag"
+  (get (nth (get er-rt-cap-result :elements) 1) :name) "v2")
+
+(er-eval-test "capstone soft_purge while v1 alive = false"
+  (get (nth (get er-rt-cap-result :elements) 2) :name) "false")
+
+(er-eval-test "capstone hard purge = true"
+  (get (nth (get er-rt-cap-result :elements) 3) :name) "true")
+
+(er-eval-test "capstone soft_purge clean after hard = true"
+  (get (nth (get er-rt-cap-result :elements) 4) :name) "true")
+
 (define
   er-eval-test-summary
   (str "eval " er-eval-test-pass "/" er-eval-test-count))