Add protection when unable to generate with given params

1 files changed, 4 insertions, 0 deletions

diff --git a/rng.ha b/rng.ha
index d016e15..4ed160a 100644
--- a/rng.ha
+++ b/rng.ha
@@ -34,6 +34,10 @@ export fn main() void = {
 		};
 	};
 
+	if (nodups && max < nb) {
+		fmt::fatal("Can't generate the desired number of randoms without duplicates");
+	};
+
 	let seed = time::unix(time::now(time::clock::MONOTONIC));
 	let r = random::init(seed: u32);
 	let rngs: []u32 = [];