Fix an arithmetic overflow in reparser

1 files changed, 2 insertions, 2 deletions

diff --git a/crates/ra_syntax/src/parsing/reparsing.rs b/crates/ra_syntax/src/parsing/reparsing.rs
index ba77a3b6c..b44cca49d 100644
--- a/crates/ra_syntax/src/parsing/reparsing.rs
+++ b/crates/ra_syntax/src/parsing/reparsing.rs
@@ -130,11 +130,11 @@ fn merge_errors(
         if e.offset() <= old_node.range().start() {
             res.push(e)
         } else if e.offset() >= old_node.range().end() {
-            res.push(e.add_offset(TextUnit::of_str(&edit.insert) - edit.delete.len()));
+            res.push(e.add_offset(TextUnit::of_str(&edit.insert), edit.delete.len()));
         }
     }
     for e in new_errors {
-        res.push(e.add_offset(old_node.range().start()));
+        res.push(e.add_offset(old_node.range().start(), 0.into()));
     }
     res
 }