1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_parse/src/parser/mod.rs b/compiler/rustc_parse/src/parser/mod.rs
index 61e3fa2e6c5..b72957ace52 100644
--- a/compiler/rustc_parse/src/parser/mod.rs
+++ b/compiler/rustc_parse/src/parser/mod.rs
@@ -238,7 +238,8 @@ impl NodeRange {
     // is the position of the function's start token. This gives
     // `NodeRange(10..15)`.
     fn new(ParserRange(parser_range): ParserRange, start_pos: u32) -> NodeRange {
-        assert!(parser_range.start >= start_pos && parser_range.end >= start_pos);
+        assert!(!parser_range.is_empty());
+        assert!(parser_range.start >= start_pos);
         NodeRange((parser_range.start - start_pos)..(parser_range.end - start_pos))
     }
 }