From 72574dac02bfecded82a544655e8bfd83154caec Mon Sep 17 00:00:00 2001
From: HaoranYi <haoran.yi@gmail.com>
Date: Mon, 9 Oct 2023 09:38:00 -0500
Subject: [PATCH] Assert acount hash mmap file capacity > 0 (#33575)

assert mmap capacity > 0

Co-authored-by: HaoranYi <haoran.yi@solana.com>
---
 accounts-db/src/accounts_hash.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/accounts-db/src/accounts_hash.rs b/accounts-db/src/accounts_hash.rs
index 66a77c8188..222f2b1a64 100644
--- a/accounts-db/src/accounts_hash.rs
+++ b/accounts-db/src/accounts_hash.rs
@@ -97,6 +97,7 @@ impl AccountHashesFile {
             // Theoretical performance optimization: write a zero to the end of
             // the file so that we won't have to resize it later, which may be
             // expensive.
+            assert!(self.capacity > 0);
             data.seek(SeekFrom::Start((self.capacity - 1) as u64))
                 .unwrap();
             data.write_all(&[0]).unwrap();