From 60e2ca94e5050b839ee57e8129195b65e5dba0e3 Mon Sep 17 00:00:00 2001
From: mrambacher <mrambach@gmail.com>
Date: Wed, 15 Feb 2023 06:59:59 -0500
Subject: [PATCH] fault_injection_fs: Add back accidental revert in
 DropRandomUnsyncedData (#402)

Code was accidentally dropped during recent PR (#380)
---
 utilities/fault_injection_fs.cc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/utilities/fault_injection_fs.cc b/utilities/fault_injection_fs.cc
index 2bd2384060..343b68bec6 100644
--- a/utilities/fault_injection_fs.cc
+++ b/utilities/fault_injection_fs.cc
@@ -83,9 +83,11 @@ IOStatus FSFileState::DropUnsyncedData() {
 }
 
 IOStatus FSFileState::DropRandomUnsyncedData(Random* rand) {
-  int range = static_cast<int>(buffer_.size());
-  size_t truncated_size = static_cast<size_t>(rand->Uniform(range));
-  buffer_.resize(truncated_size);
+  const int range = static_cast<int>(buffer_.size());
+  if (range > 0) {
+    size_t truncated_size = static_cast<size_t>(rand->Uniform(range));
+    buffer_.resize(truncated_size);
+  }
   return IOStatus::OK();
 }