1 files changed, 2 insertions, 1 deletions
diff --git a/src/librustc_session/parse.rs b/src/librustc_session/parse.rs
index ddbc95fb1b0..f4e5da4d54f 100644
--- a/src/librustc_session/parse.rs
+++ b/src/librustc_session/parse.rs
@@ -13,6 +13,7 @@ use rustc_span::hygiene::ExpnId;
 use rustc_span::source_map::{FilePathMapping, SourceMap};
 use rustc_span::{MultiSpan, Span, Symbol};
 
+use std::collections::BTreeMap;
 use std::path::PathBuf;
 use std::str;
 
@@ -63,7 +64,7 @@ impl GatedSpans {
 #[derive(Default)]
 pub struct SymbolGallery {
     /// All symbols occurred and their first occurrance span.
-    pub symbols: Lock<FxHashMap<Symbol, Span>>,
+    pub symbols: Lock<BTreeMap<Symbol, Span>>,
 }
 
 impl SymbolGallery {