use saturating substraction to calculate Line ranges

2021-10-09 06:08:07 -05:00 · 2021-10-09 06:08:07 -05:00 · ce4ddc0911
parent aed4ea144f
commit ce4ddc0911
1 changed files with 2 additions and 1 deletions
--- a/src/controller.rs
+++ b/src/controller.rs
@ -177,7 +177,8 @@ impl<'b> Controller<'b> {
                    if let Some(line_changes) = line_changes {
                        for &line in line_changes.keys() {
                            let line = line as usize;
-                            line_ranges.push(LineRange::new(line - context, line + context));
+                            line_ranges
+                                .push(LineRange::new(line.saturating_sub(context), line + context));
                        }
                    }