prevents an overflowing subtraction when using JLink

oxidecomputer · Apr 3, 2022 · ed12148 · ed12148
1 parent 22c2b83
commit ed12148
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/humility-core/src/core.rs b/humility-core/src/core.rs
@@ -593,7 +593,9 @@ impl GDBCore {
             // We are done when we have our closing delimter followed by
             // the two byte checksum.
             //
-            if result.find(GDB_PACKET_END) == Some(result.len() - 3) {
+            if result.len() >= 3
+                && result.find(GDB_PACKET_END) == Some(result.len() - 3)
+            {
                 break;
             }
         }