Fix subtraction underflow bug

schungx · Aug 1, 2024 · ebfa1b8 · ebfa1b8
1 parent b7abf44
commit ebfa1b8
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -8,6 +8,7 @@ Bug fixes
 ---------
 
 * (Fuzzing) An integer-overflow bug from an inclusive range in the bits iterator is fixed.
+* (Fuzzing) An integer-underflow bug from an inclusive range is fixed.
 
 Enhancements
 ------------

diff --git a/src/eval/target.rs b/src/eval/target.rs
@@ -404,6 +404,8 @@ impl<'a> Target<'a> {
                 let ve = if *exclusive {
                     let end = if *end > n { n } else { *end };
                     s.chars().skip(end)
+                } else if n == 0 {
+                    s.chars().skip(usize::MAX)
                 } else {
                     let end = if *end >= n { n - 1 } else { *end };
                     s.chars().skip(end + 1)