Fix build error in example

Author: jabagawee

rls-analysis/examples/print-crate-id.rs

@@ -2,6 +2,7 @@ extern crate env_logger;
 extern crate rls_analysis;
 
 use rls_analysis::{AnalysisHost, AnalysisLoader, SearchDirectory};
+use std::collections::HashMap;
 use std::env;
 use std::path::{Path, PathBuf};
 
@@ -42,7 +43,7 @@ fn main() {
         std::process::exit(1);
     }
     let loader = Loader::new(PathBuf::from(env::args().nth(1).unwrap()));
-    let crates = rls_analysis::read_analysis_from_files(&loader, Default::default(), &[]);
+    let crates = rls_analysis::read_analysis_from_files(&loader, HashMap::new(), &[]);
 
     for krate in &crates {
         println!("Crate {:?} data version {:?}", krate.id, krate.analysis.version);

rls-analysis/src/raw.rs

@@ -50,7 +50,7 @@ impl Crate {
 
 /// Reads raw analysis data for non-blacklisted crates from files in directories
 /// pointed by `loader`.
-pub fn read_analysis_from_files<L: AnalysisLoader, S: std::hash::BuildHasher>(
+pub fn read_analysis_from_files<L: AnalysisLoader, S: std::hash::BuildHasher + Default>(
     loader: &L,
     crate_timestamps: HashMap<PathBuf, SystemTime, S>,
     crate_blacklist: Blacklist,