Fix reparsing failure when removing newline

2 files changed, 14 insertions, 0 deletions

diff --git a/crates/ra_syntax/src/parsing/reparsing.rs b/crates/ra_syntax/src/parsing/reparsing.rs
index d54669a95..7e7f914f5 100644
--- a/crates/ra_syntax/src/parsing/reparsing.rs
+++ b/crates/ra_syntax/src/parsing/reparsing.rs
@@ -39,6 +39,13 @@ fn reparse_leaf<'node>(
     let node = algo::find_covering_node(root, edit.delete);
     match node.kind() {
         WHITESPACE | COMMENT | IDENT | STRING | RAW_STRING => {
+            if node.kind() == WHITESPACE || node.kind() == COMMENT {
+                // removing a new line may extends previous token
+                if node.text().to_string()[edit.delete - node.range().start()].contains('\n') {
+                    return None;
+                }
+            }
+
             let text = get_text_after_edit(node, &edit);
             let tokens = tokenize(&text);
             let token = match tokens[..] {
diff --git a/crates/ra_syntax/tests/data/reparse/fuzz-failures/0005.rs b/crates/ra_syntax/tests/data/reparse/fuzz-failures/0005.rs
new file mode 100644
index 000000000..074d761c7
--- /dev/null
+++ b/crates/ra_syntax/tests/data/reparse/fuzz-failures/0005.rs
@@ -0,0 +1,7 @@
+05
+1
+
+
+
+b'

+                
\ No newline at end of file