From efc3f3af29f233ce1d691a458af0b40a1961a155 Mon Sep 17 00:00:00 2001
From: Eric Coissac <eric@coissac.eu>
Date: Tue, 17 Jun 2025 12:05:42 +0200
Subject: [PATCH] Patch a concurrent access problem

---
 pkg/obioptions/version.go | 2 +-
 pkg/obiseq/merge.go       | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/pkg/obioptions/version.go b/pkg/obioptions/version.go
index f2b2585..d06fd67 100644
--- a/pkg/obioptions/version.go
+++ b/pkg/obioptions/version.go
@@ -8,7 +8,7 @@ import (
 // corresponds to the last commit, and not the one when the file will be
 // commited
 
-var _Commit = "38dcd98"
+var _Commit = "1c6ab1c"
 var _Version = "Release 4.4.0"
 
 // Version returns the version of the obitools package.
diff --git a/pkg/obiseq/merge.go b/pkg/obiseq/merge.go
index 98827ed..be598fa 100644
--- a/pkg/obiseq/merge.go
+++ b/pkg/obiseq/merge.go
@@ -174,12 +174,15 @@ func (sequence *BioSequence) StatsPlusOne(desc StatsOnDescription, toAdd *BioSeq
 
 	}
 
+	sequence.annot_lock.Lock()
 	old, ok := stats[sval]
 	if !ok {
 		old = 0
 	}
 
 	stats[sval] = old + desc.Weight(toAdd)
+	sequence.annot_lock.Unlock()
+
 	sequence.SetAttribute(StatsOnSlotName(desc.Name), stats) // TODO: check if this is necessary
 	return retval
 }
@@ -228,7 +231,9 @@ func (sequence *BioSequence) Merge(tomerge *BioSequence, na string, inplace bool
 			smk := sequence.StatsOn(desc, na)
 			mmk := tomerge.StatsOn(desc, na)
 
+			sequence.annot_lock.Lock()
 			annotations[StatsOnSlotName(key)] = smk.Merge(mmk)
+			sequence.annot_lock.Unlock()
 		} else {
 			sequence.StatsPlusOne(desc, tomerge, na)
 		}