Do not use stable hashing with all-zero seed.

2022-09-27 16:39:19 +08:00
parent 2ecf44a48e
commit b141e8d0e1
4 changed files with 7 additions and 4 deletions
--- a/src/func/hashing.rs
+++ b/src/func/hashing.rs
@@ -76,7 +76,11 @@ impl BuildHasher for StraightHasherBuilder {
 #[must_use]
 pub fn get_hasher() -> ahash::AHasher {
    if let Some([seed1, seed2, seed3, seed4]) = config::AHASH_SEED {
-        ahash::RandomState::with_seeds(seed1, seed2, seed3, seed4).build_hasher()
+        if seed1 | seed2 | seed3 | seed4 != 0 {
+            ahash::RandomState::with_seeds(seed1, seed2, seed3, seed4).build_hasher()
+        } else {
+            ahash::AHasher::default()
+        }
    } else {
        ahash::AHasher::default()
    }