From 449ff435cc1320287001a71f5b6036d7cb094694 Mon Sep 17 00:00:00 2001
From: Steven Allen <steven@stebalien.com>
Date: Wed, 29 Nov 2023 16:21:00 +0400
Subject: [PATCH] Update build/isnearupgrade.go
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Co-authored-by: Friðrik Ásmundsson <fridrik01@gmail.com>
---
 build/isnearupgrade.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/build/isnearupgrade.go b/build/isnearupgrade.go
index bd6e664efa6..3590a901071 100644
--- a/build/isnearupgrade.go
+++ b/build/isnearupgrade.go
@@ -5,5 +5,8 @@ import (
 )
 
 func IsNearUpgrade(epoch, upgradeEpoch abi.ChainEpoch) bool {
-	return upgradeEpoch >= 0 && epoch > upgradeEpoch-Finality && epoch < upgradeEpoch+Finality
+	if upgradeEpoch < 0 {
+	    return false
+	}
+	return epoch > upgradeEpoch-Finality && epoch < upgradeEpoch+Finality
 }