feat: check cargo uninstall package opt with empty value

Author: weihanglo

src/bin/cargo/commands/uninstall.rs

@@ -15,6 +15,14 @@ pub fn cli() -> App {
 
 pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let root = args.value_of("root");
+
+    if args.is_present_with_zero_values("package") {
+        return Err(anyhow::anyhow!(
+            "\"--package <SPEC>\" requires a SPEC format value.\n\
+            Run `cargo help pkgid` for more information about SPEC format."
+        ).into())
+    }
+
     let specs = args
         .values_of("spec")
         .unwrap_or_else(|| args.values_of("package").unwrap_or_default())