Merge branch 'v0.6.x'

# Conflicts:
#	serde/src/de/impls.rs
#	serde_codegen/src/de.rs

serde/src/de/impls.rs

@@ -762,7 +762,7 @@ impl Deserialize for path::PathBuf {
     fn deserialize<D>(deserializer: &mut D) -> Result<path::PathBuf, D::Error>
         where D: Deserializer,
     {
-        deserializer.deserialize(PathBufVisitor)
+        deserializer.deserialize_string(PathBufVisitor)
     }
 }
 

serde/src/de/mod.rs

@@ -406,6 +406,16 @@ pub trait Deserializer {
         self.deserialize_seq(visitor)
     }
 
+    /// This method hints that the `Deserialize` type is expecting some sort of struct key mapping.
+    /// This allows deserializers to choose between &str, usize, or &[u8] to properly deserialize a
+    /// struct key.
+    #[inline]
+    fn deserialize_struct_key<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error>
+        where V: Visitor,
+    {
+        self.deserialize(visitor)
+    }
+
     /// Specify a format string for the deserializer.
     ///
     /// The deserializer format is used to determine which format