From 0cad43a114ba0a1a46ec51c725e51de59048d049 Mon Sep 17 00:00:00 2001
From: Juergen Spitzmueller <spitz@lyx.org>
Date: Sat, 22 Mar 2014 12:09:18 +0100
Subject: [PATCH] Fix assertion when ChkTeX hit math.

The problem here was that we used texted-only methods (via paragraph()), which triggered the assertion as soon as we were inside math.

Fixes: #8798
---
 src/BufferView.cpp                 | 5 ++++-
 src/frontends/qt4/GuiErrorList.cpp | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/BufferView.cpp b/src/BufferView.cpp
index e4ca2450b8..cb2214c759 100644
--- a/src/BufferView.cpp
+++ b/src/BufferView.cpp
@@ -62,6 +62,8 @@
 #include "insets/InsetRef.h"
 #include "insets/InsetText.h"
 
+#include "mathed/MathData.h"
+
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 #include "frontends/Delegates.h"
@@ -2460,7 +2462,8 @@ void BufferView::putSelectionAt(DocIterator const & cur,
 
 bool BufferView::selectIfEmpty(DocIterator & cur)
 {
-	if (!cur.paragraph().empty())
+	if ((cur.inTexted() && !cur.paragraph().empty())
+	    || cur.inMathed() && !cur.cell().empty())
 		return false;
 
 	pit_type const beg_pit = cur.pit();
diff --git a/src/frontends/qt4/GuiErrorList.cpp b/src/frontends/qt4/GuiErrorList.cpp
index 9924d649a1..1ab919880f 100644
--- a/src/frontends/qt4/GuiErrorList.cpp
+++ b/src/frontends/qt4/GuiErrorList.cpp
@@ -188,7 +188,7 @@ bool GuiErrorList::goTo(int item)
 		return false;
 	}
 	// if pos_end is 0, this means it is end-of-paragraph
-	pos_type const s = dit.paragraph().size();
+	pos_type const s = dit.lastpos();
 	pos_type const end = err.pos_end ? min(err.pos_end, s) : s;
 	pos_type const start = min(err.pos_start, end);
 	pos_type const range = end == start ? s - start : end - start;