Upgrade to rand 0.4.2.

CHANGELOG.md

@@ -13,6 +13,8 @@
   you've written your own strategy types or if you've used
   `TestCaseError::Reject` or `TestCaseError::Fail` explicitly.
 
+- Update of externally-visible crate `rand` to `0.4.2`.
+
 ### New Additions
 
 - Added `proptest::test_runner::Reason` which allows you to avoid heap

Cargo.toml

@@ -26,7 +26,7 @@ unstable = []
 [dependencies]
 bit-set = "0.4.0"
 quick-error = "1.2.1"
-rand = "0.3.18"
+rand = "0.4.2"
 regex-syntax = "0.4.1"
 lazy_static = "0.2.8"
 

src/bits.rs

@@ -214,7 +214,10 @@ impl<T : BitSetLike> Strategy for SampledBitSetStrategy<T> {
     fn new_value(&self, runner: &mut TestRunner) -> NewTree<Self> {
         let mut bits = T::new_bitset(self.bits.end);
         let count = runner.rng().gen_range(self.size.start, self.size.end);
-        for bit in rand::sample(runner.rng(), self.bits.clone(), count) {
+        for bit in
+            rand::seq::sample_iter(runner.rng(), self.bits.clone(), count)
+            .expect("not enough bits to sample")
+        {
             bits.set(bit);
         }