use checked multiplication in heap_index! macro

2025-12-07 21:31:24 +01:00
parent 2fc08dde1e
commit d63b0a192c
1 changed files with 9 additions and 4 deletions
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -471,11 +471,16 @@ macro_rules! resource_error_call_result {
 }

 macro_rules! heap_index {
-    ($idx:expr) => {
+    ($idx:expr) => {{
+        let idx = $idx;
        std::mem::size_of::<HeapCellValue>()
-            .checked_mul($idx)
-            .unwrap()
-    };
+            .checked_mul(idx)
+            .expect(&format!(
+                "overflow while calculating heap index {idx} * {} > {}",
+                std::mem::size_of::<HeapCellValue>(),
+                usize::MAX,
+            ))
+    }};
 }

 macro_rules! cell_index {