bump quickcheck to 0.5

Signed-off-by: Igor Gnatenko <[email protected]>

Author: cuviper

Cargo.toml

@@ -35,7 +35,7 @@ utf8-ranges = "1.0.0"
 # For examples.
 lazy_static = "0.2.2"
 # For property based tests.
-quickcheck = { version = "0.4.1", default-features = false }
+quickcheck = { version = "0.5", default-features = false }
 # For generating random test data.
 rand = "0.3.15"
 

regex-syntax/Cargo.toml

@@ -9,5 +9,5 @@ homepage = "https://github.com/rust-lang/regex"
 description = "A regular expression parser."
 
 [dev-dependencies]
-quickcheck = { version = "0.4.1", default-features = false }
+quickcheck = { version = "0.5", default-features = false }
 rand = "0.3.15"

regex-syntax/src/properties.rs

@@ -188,8 +188,8 @@ impl Arbitrary for Expr {
             ClassBytes(ref cls) => Box::new(cls.shrink().map(ClassBytes)),
             Group { ref e, ref i, ref name } => {
                 let (i, name) = (i.clone(), name.clone());
-                Box::new(e.clone().shrink()
-                          .chain(e.clone().shrink()
+                Box::new((*e.clone()).shrink()
+                          .chain((*e.clone()).shrink()
                                   .map(move |e| Group {
                                       e: Box::new(e),
                                       i: i.clone(),