fix tests and compile warning

Author: fee1-dead

crates/crates-io/lib.rs

@@ -77,10 +77,14 @@ pub struct NewCrateDependency {
     pub artifact: Option<Vec<String>>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub bindep_target: Option<String>,
-    #[serde(default)]
+    #[serde(default, skip_serializing_if = "is_false")]
     pub lib: bool,
 }
 
+fn is_false(&x: &bool) -> bool {
+    !x
+}
+
 #[derive(Deserialize)]
 pub struct User {
     pub id: u32,

src/cargo/core/compiler/unit_dependencies.rs

@@ -149,7 +149,7 @@ pub fn build_unit_dependencies<'a, 'cfg>(
 
 /// Compute all the dependencies for the standard library.
 fn calc_deps_of_std(
-    mut state: &mut State<'_, '_>,
+    state: &mut State<'_, '_>,
     std_roots: &HashMap<CompileKind, Vec<Unit>>,
 ) -> CargoResult<Option<UnitGraph>> {
     if std_roots.is_empty() {

src/cargo/sources/registry/mod.rs

@@ -365,6 +365,7 @@ struct RegistryDependency<'a> {
     public: Option<bool>,
     artifact: Option<Vec<Cow<'a, str>>>,
     bindep_target: Option<Cow<'a, str>>,
+    #[serde(default)]
     lib: bool,
 }
 

tests/testsuite/artifact_dep.rs

@@ -1926,15 +1926,25 @@ You may press ctrl-c [..]
           "badges": {},
           "categories": [],
           "deps": [{
+              "artifact": [
+                "bin"
+              ],
               "default_features": true,
               "features": [],
               "kind": "normal",
+              "lib": true,
               "name": "bar",
               "optional": false,
               "target": null,
               "version_req": "^1.0"
             },
             {
+              "artifact": [
+                "bin:a",
+                "cdylib",
+                "staticlib"
+              ],
+              "bindep_target": "target",
               "default_features": true,
               "features": [],
               "kind": "build",