fix: release typecheck environment allocations

2026-10-01 23:53:08 +00:00
parent 68ae75129d
commit da51e33411
3 changed files with 53 additions and 2 deletions
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+"""Check that typecheck releases its temporary type environment."""
+from pathlib import Path
+import os
+import subprocess
+import sys
+import tempfile
+
+ROOT = Path(__file__).resolve().parent.parent
+
+
+def main() -> int:
+    if os.name == "nt":
+        print("SKIP: LeakSanitizer check is POSIX-only")
+        return 0
+    with tempfile.TemporaryDirectory(prefix="typecheck-env-cleanup-") as tmp:
+        tmp_path = Path(tmp)
+        binary = tmp_path / "claro-lsan"
+        script = tmp_path / "typecheck.claro"
+        script.write_text("SET known TO 1\n" + "SAY known\n" * 2000, encoding="utf-8")
+        build = subprocess.run(
+            ["gcc", "-std=c99", "-O0", "-g", "-fsanitize=address,undefined",
+             "src/claro.c", "-o", str(binary), "-lm"],
+            cwd=ROOT, text=True, capture_output=True,
+        )
+        if build.returncode:
+            print(build.stdout, end="")
+            print(build.stderr, end="", file=sys.stderr)
+            return build.returncode
+        run = subprocess.run(
+            [str(binary), "typecheck", str(script)], cwd=ROOT, text=True,
+            capture_output=True, env={**os.environ, "ASAN_OPTIONS": "detect_leaks=1"},
+        )
+        if run.returncode:
+            print("FAIL: typecheck temporary-state cleanup probe failed")
+            print(run.stdout, end="")
+            print(run.stderr, end="", file=sys.stderr)
+            return 1
+        if "LeakSanitizer" in run.stderr or "SUMMARY:" in run.stderr:
+            print("FAIL: typecheck environment allocations still leak")
+            print(run.stderr, end="", file=sys.stderr)
+            return 1
+        print("PASS: typecheck environment allocations are released")
+        return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())