1 files changed, 14 insertions, 3 deletions
diff --git a/vendor/proptest/src/bits.rs b/vendor/proptest/src/bits.rs
index 342eb28b1..89b183ed1 100644
--- a/vendor/proptest/src/bits.rs
+++ b/vendor/proptest/src/bits.rs
@@ -22,6 +22,8 @@ use core::mem;
 
 #[cfg(feature = "bit-set")]
 use bit_set::BitSet;
+#[cfg(feature = "bit-set")]
+use bit_vec::BitVec;
 use rand::{self, seq::IteratorRandom, Rng};
 
 use crate::collection::SizeRange;
@@ -450,8 +452,15 @@ pub(crate) mod varsize {
 
     impl VarBitSet {
         /// Create a bit set of `len` set values.
+        #[cfg(not(feature = "bit-set"))]
+        pub fn saturated(len: usize) -> Self {
+            Self(vec![true; len])
+        }
+
+        /// Create a bit set of `len` set values.
+        #[cfg(feature = "bit-set")]
         pub fn saturated(len: usize) -> Self {
-            (0..len).collect::<VarBitSet>()
+            Self(BitSet::from_bit_vec(BitVec::from_elem(len, true)))
         }
 
         #[cfg(not(feature = "bit-set"))]
@@ -492,8 +501,10 @@ pub(crate) mod varsize {
     }
 
     impl FromIterator<usize> for VarBitSet {
-        fn from_iter<T: IntoIterator<Item = usize>>(iter: T) -> Self {
-            let mut bits = VarBitSet::new_bitset(0);
+        fn from_iter<T: IntoIterator<Item = usize>>(into_iter: T) -> Self {
+            let iter = into_iter.into_iter();
+            let lower_bound = iter.size_hint().0;
+            let mut bits = VarBitSet::new_bitset(lower_bound);
             for bit in iter {
                 bits.set(bit);
             }