From b7fece51736977e7d84aca30ecce7f6b3a1251f2 Mon Sep 17 00:00:00 2001
From: xuri <xuri.me@gmail.com>
Date: Tue, 6 Jul 2021 00:31:04 +0800
Subject: Support concurrency add picture

---
 calcchain.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'calcchain.go')

diff --git a/calcchain.go b/calcchain.go
index 1b99a04..671d144 100644
--- a/calcchain.go
+++ b/calcchain.go
@@ -56,6 +56,8 @@ func (f *File) deleteCalcChain(index int, axis string) {
 		f.CalcChain = nil
 		f.Pkg.Delete("xl/calcChain.xml")
 		content := f.contentTypesReader()
+		content.Lock()
+		defer content.Unlock()
 		for k, v := range content.Overrides {
 			if v.PartName == "/xl/calcChain.xml" {
 				content.Overrides = append(content.Overrides[:k], content.Overrides[k+1:]...)
-- 
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