- Use @pool_init() to set up a temp pool on a thread. Only the main thread has implicit temp pool setup.

- `tmem` is now a variable.

lib/std/core/runtime_test.c3

@@ -329,6 +329,6 @@ fn bool run_tests(String[] args, TestUnit[] tests) @private
 fn bool default_test_runner(String[] args) => @pool()
 {
 	assert(test_context == null, "test suite is already running");
-	return run_tests(args, test_collection_create(tmem()));
+	return run_tests(args, test_collection_create(tmem));
 }