From 4509607bf6bc528fba3066da3f9e7abaf142f1e1 Mon Sep 17 00:00:00 2001
From: Richard Heck <rgheck@comcast.net>
Date: Mon, 9 Aug 2010 16:18:57 +0000
Subject: [PATCH] Do not invalidate cache unless we find some BibTeX insets.
 Part of #6846.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@35102 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/Buffer.cpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/Buffer.cpp b/src/Buffer.cpp
index 15e05177f3..d4037ee181 100644
--- a/src/Buffer.cpp
+++ b/src/Buffer.cpp
@@ -1711,19 +1711,23 @@ void Buffer::updateBibfilesCache(UpdateScope scope) const
 			d->bibfiles_cache_.insert(d->bibfiles_cache_.end(),
 				bibfiles.begin(),
 				bibfiles.end());
+			// the bibinfo cache is now invalid
+			d->bibinfo_cache_valid_ = false;
 		} else if (it->lyxCode() == INCLUDE_CODE) {
 			InsetInclude & inset =
 				static_cast<InsetInclude &>(*it);
 			inset.updateBibfilesCache();
 			support::FileNameList const & bibfiles =
 					inset.getBibfilesCache();
-			d->bibfiles_cache_.insert(d->bibfiles_cache_.end(),
-				bibfiles.begin(),
-				bibfiles.end());
+			if (!bibfiles.empty()) {
+				d->bibfiles_cache_.insert(d->bibfiles_cache_.end(),
+					bibfiles.begin(),
+					bibfiles.end());
+				// the bibinfo cache is now invalid
+				d->bibinfo_cache_valid_ = false;
+			}	
 		}
 	}
-	// the bibinfo cache is now invalid
-	d->bibinfo_cache_valid_ = false;
 }
 
 
-- 
2.39.2