void checkStr(String s, String err) {
Env env = null;
try {
env = Exec2.exec(s);
env.remove_and_unlock();
fail(); // Supposed to throw; reaching here is an error
} catch (IllegalArgumentException e) {
assertEquals(err, e.getMessage());
}
debug_print(s);
}
void checkStr(String s) {
Env env = null;
try {
env = Exec2.exec(s);
if (env.isAry()) { // Print complete frames for inspection
Frame res = env.popAry();
String skey = env.key();
System.out.println(res.toStringAll());
env.subRef(res, skey); // But then end lifetime
} else {
System.out.println(env.resultString());
}
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage());
}
if (env != null) env.remove_and_unlock();
debug_print(s);
}