From: Richard Heck <rgheck@lyx.org>
Date: Mon, 12 Feb 2018 21:26:27 +0000 (-0500)
Subject: Fix crash when citeengine is unknown.
X-Git-Tag: lyx-2.4.0dev-acb2ca7b~3878
X-Git-Url: https://git.lyx.org/gitweb/?a=commitdiff_plain;h=5ee3396459602e0982234cab064c5c960af7e4fc;p=features.git

Fix crash when citeengine is unknown.
---

diff --git a/src/frontends/qt4/GuiDocument.cpp b/src/frontends/qt4/GuiDocument.cpp
index 85318bc7f0..8149b5070f 100644
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -4007,6 +4007,12 @@ bool GuiDocument::isBiblatex() const
 		biblioModule->citeEngineCO->itemData(
 				biblioModule->citeEngineCO->currentIndex()).toString();
 
+	// this can happen if the cite engine is unknown, which can happen
+	// if one is using a file that came from someone else, etc. in that
+	// case, we crash if we proceed.
+	if (engine.isEmpty())
+	    return false;
+
 	return theCiteEnginesList[fromqstr(engine)]->getCiteFramework() == "biblatex";
 }