test: add phase95 json_loader escape fixture

apps/tests/phase95_json_loader_escape_min.hako

@@ -0,0 +1,34 @@
+// Phase 95: json_loader escape loop (minimal)
+// Purpose: Fixture extracted from MiniJsonLoader.read_quoted_from to exercise
+//          Phase 94 derived body-local + conditional skip in JoinIR.
+
+static box Main {
+    main() {
+        // Input mirrors the json_loader escape case
+        local s = "\"hello\\\" world\""
+        local pos = 0
+        local i = pos
+        if s.substring(i, i + 1) != "\"" { return "NG" }
+        i = i + 1
+        local out = ""
+        local n = s.length()
+
+        loop(i < n) {
+            local ch = s.substring(i, i + 1)
+            if ch == "\"" { break }
+
+            if ch == "\\" {
+                i = i + 1
+                if i < n {
+                    ch = s.substring(i, i + 1)
+                }
+            }
+
+            out = out + ch
+            i = i + 1
+        }
+
+        print(out)
+        return "OK"
+    }
+}

tools/smokes/v2/profiles/integration/apps/phase95_json_loader_escape_vm.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+# Phase 95: json_loader escape loop (VM)
+#
+# Verifies:
+# - Phase 94 derived body-local + conditional skip works on the MiniJsonLoader.escape loop shape
+# - Output matches hello" world (escape removed)
+#
+# Scope: integration only (keep quick lean)
+
+source "$(dirname "$0")/../../../lib/test_runner.sh"
+export SMOKES_USE_PYVM=0
+require_env || exit 2
+
+PASS_COUNT=0
+FAIL_COUNT=0
+RUN_TIMEOUT_SECS=${RUN_TIMEOUT_SECS:-10}
+
+INPUT="$NYASH_ROOT/apps/tests/phase95_json_loader_escape_min.hako"
+
+echo "[INFO] Phase 95: json_loader escape loop (VM) - $INPUT"
+
+set +e
+OUTPUT=$(timeout "$RUN_TIMEOUT_SECS" env \
+  NYASH_DISABLE_PLUGINS=1 \
+  HAKO_JOINIR_STRICT=1 \
+  "$NYASH_BIN" --backend vm "$INPUT" 2>&1)
+EXIT_CODE=$?
+set -e
+
+if [ "$EXIT_CODE" -eq 124 ]; then
+  echo "[FAIL] hakorune timed out (>${RUN_TIMEOUT_SECS}s)"
+  FAIL_COUNT=$((FAIL_COUNT + 1))
+elif [ "$EXIT_CODE" -eq 0 ]; then
+  if echo "$OUTPUT" | grep -q '^hello" world$'; then
+    echo "[PASS] Output verified: hello\" world"
+    PASS_COUNT=$((PASS_COUNT + 1))
+  else
+    echo "[FAIL] Unexpected output (expected line: hello\" world)"
+    echo "[INFO] output (tail):"
+    echo "$OUTPUT" | tail -n 50 || true
+    FAIL_COUNT=$((FAIL_COUNT + 1))
+  fi
+else
+  echo "[FAIL] hakorune failed with exit code $EXIT_CODE"
+  echo "[INFO] output (tail):"
+  echo "$OUTPUT" | tail -n 50 || true
+  FAIL_COUNT=$((FAIL_COUNT + 1))
+fi
+
+echo "[INFO] PASS: $PASS_COUNT, FAIL: $FAIL_COUNT"
+
+if [ "$FAIL_COUNT" -eq 0 ]; then
+  test_pass "phase95_json_loader_escape_vm: All tests passed"
+  exit 0
+else
+  test_fail "phase95_json_loader_escape_vm: $FAIL_COUNT test(s) failed"
+  exit 1
+fi