Search the whole checkpoint trace if offset overflows during initial exponential search. (#3662)

2022-08-30 22:59:23 +02:00
parent 71aaca2d9d
commit affe2456ea
2 changed files with 3 additions and 3 deletions
--- a/scripts/generate/templates/Checkpoints.js
+++ b/scripts/generate/templates/Checkpoints.js
@ -83,7 +83,7 @@ function upperLookupRecent(${opts.historyTypeName} storage self, ${opts.keyTypeN
        offset <<= 1;
    }

-    uint256 low = offset < length ? length - offset : 0;
+    uint256 low = 0 < offset && offset < length ? length - offset : 0;
    uint256 high = length - (offset >> 1);
    uint256 pos = _upperBinaryLookup(self.${opts.checkpointFieldName}, key, low, high);