fix doctest and cleanup warnings

Cargo.toml

@@ -33,8 +33,8 @@ rand_xorshift = "0.4"
 regex = "1.0"
 regex-syntax = "0.8"
 rusty-fork = { version = "0.3.0", default-features = false }
-syn = "2.0.100"
+syn = "2.0.108"
 tempfile = "3.0"
-trybuild = "=1.0.90"
+trybuild = "=1.0.112"
 unarray = "0.1.4"
 x86 = "0.52.0"

proptest-derive/src/ast.rs

@@ -825,7 +825,7 @@ impl ToTokens for MapClosure {
 
 /// Construct a `FreshVar` with the given `prefix` and the number it has in the
 /// count of temporaries for that prefix.
-fn fresh_var(prefix: &str, count: usize) -> FreshVar {
+fn fresh_var(prefix: &str, count: usize) -> FreshVar<'_> {
     FreshVar { prefix, count }
 }
 

proptest/src/num.rs

@@ -238,6 +238,7 @@ macro_rules! signed_integer_bin_search {
     ($typ:ident, $int_any: ident, $uniform: ident, $incl: ident) => {
         #[allow(missing_docs)]
         pub mod $typ {
+            #[allow(unused_imports)]
             use rand::{Rng, RngCore};
 
             use crate::strategy::*;
@@ -343,6 +344,7 @@ macro_rules! unsigned_integer_bin_search {
     ($typ:ident, $int_any: ident, $uniform: ident, $incl: ident) => {
         #[allow(missing_docs)]
         pub mod $typ {
+            #[allow(unused_imports)]
             use rand::{Rng, RngCore};
 
             use crate::strategy::*;

proptest/src/test_runner/errors.rs

@@ -153,16 +153,20 @@ pub trait ProptestResultExt<T, E>: private::Sealed {
     ///
     /// ```
     /// use proptest::prelude::*;
-    /// proptest! {
-    ///   #[test]
-    ///   fn test_that_only_works_with_positive_integers(a in -10i32..10i32) {
+    ///
+    /// fn test_conversion(a: i32) -> Result<(), TestCaseError> {
     ///     // Reject the case if `a` cannot be converted to u8 (e.g., negative values)
     ///     let _unsigned: u8 = a.try_into().prop_assume_ok()?;
     ///     // ...rest of test...
+    ///     Ok(())
+    /// }
+    ///
+    /// proptest! {
+    ///   #[test]
+    ///   fn test_that_only_works_with_positive_integers(a in -10i32..10i32) {
+    ///     test_conversion(a)?;
     ///   }
     /// }
-    /// #
-    /// # fn main() { test_signed_to_unsigned(); }
     /// ```
     ///
     /// [`prop_assume!`]: crate::prop_assume