From edf7cb521e445a0c26227fc2a783fdac8254ec87 Mon Sep 17 00:00:00 2001
From: Bertrand Bellenot <bellenot@users.noreply.github.com>
Date: Wed, 11 Dec 2024 17:15:42 +0100
Subject: [PATCH] Fix assertion failure in TTreeCache

---
 tree/tree/src/TTreeCache.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tree/tree/src/TTreeCache.cxx b/tree/tree/src/TTreeCache.cxx
index 5866134741a2b..205b8e496c1a2 100644
--- a/tree/tree/src/TTreeCache.cxx
+++ b/tree/tree/src/TTreeCache.cxx
@@ -902,7 +902,7 @@ bool TTreeCache::ProcessMiss(Long64_t pos, int len)
       mcentry.fIndex = cumulative;
       cumulative += mcentry.fIO.fLen;
    }
-   fMissCache->fData.reserve(cumulative);
+   fMissCache->fData.resize(cumulative);
    // printf("Reading %lu bytes into miss cache for %lu entries.\n", cumulative, fEntries->size());
    fNMissReadPref += fMissCache->fEntries.size();
    fFile->ReadBuffers(&(fMissCache->fData[0]), &(positions[0]), &(lengths[0]), fMissCache->fEntries.size());