Bustage fixes: compile on stable; avoid unused variable warning.

db/src/bootstrap.rs

@@ -207,7 +207,7 @@ fn symbolic_schema_to_triples(ident_map: &IdentMap, symbolic_schema: &Value) ->
             for (ident, mp) in m {
                 let ident = match ident {
                     &Value::Keyword(ref ident) => ident,
-                    v => bail!(ErrorKind::BadBootstrapDefinition(format!("Expected namespaced keyword for ident but got '{:?}'", ident))),
+                    _ => bail!(ErrorKind::BadBootstrapDefinition(format!("Expected namespaced keyword for ident but got '{:?}'", ident))),
                 };
                 match *mp {
                     Value::Map(ref mpp) => {

edn/src/namespaceable_name.rs

@@ -17,9 +17,15 @@ use std::cmp::{
 use std::fmt;
 
 #[cfg(feature = "serde_support")]
-use serde::{
-    de::{self, Deserialize, Deserializer},
-    ser::{Serialize, Serializer}
+use serde::de::{
+    self,
+    Deserialize,
+    Deserializer
+};
+#[cfg(feature = "serde_support")]
+use serde::ser::{
+    Serialize,
+    Serializer,
 };
 
 // Data storage for both NamespaceableKeyword and NamespaceableSymbol.