From 7d30e34b08827a4fd6449dc12e86dd7eb37ee04e Mon Sep 17 00:00:00 2001
From: Vincent van Ravesteijn <vfr@lyx.org>
Date: Fri, 12 Mar 2010 15:06:13 +0000
Subject: [PATCH] Fix bug #6462: Out-of-bounds index in GuiErrorList::goTo when
 new buffer is active.

Cache the buffer and errorList in the GuiErrorList dialog. Now, we can check whether the active buffer is also the buffer for which the errors are shown. We switch back to the correct buffer, when one clicks on an item or clicks "View complete log".

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33726 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/frontends/qt4/GuiErrorList.cpp | 32 ++++++++++++++++++++++--------
 src/frontends/qt4/GuiErrorList.h   |  4 ++++
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/src/frontends/qt4/GuiErrorList.cpp b/src/frontends/qt4/GuiErrorList.cpp
index dca16bd308..17c07673a8 100644
--- a/src/frontends/qt4/GuiErrorList.cpp
+++ b/src/frontends/qt4/GuiErrorList.cpp
@@ -12,11 +12,13 @@
 
 #include "GuiErrorList.h"
 
+#include "GuiView.h"
 #include "qt_helpers.h"
 
 #include "Buffer.h"
 #include "BufferView.h"
 #include "FuncRequest.h"
+#include "BufferList.h"
 #include "ParIterator.h"
 #include "Text.h"
 
@@ -90,6 +92,12 @@ void GuiErrorList::select()
 
 void GuiErrorList::viewLog()
 {
+	if (&buffer() != buf_) {
+		if (!theBufferList().isLoaded(buf_))
+			return;
+		FuncRequest fr(LFUN_BUFFER_SWITCH, buf_->absFileName());
+		dispatch(fr);
+	}
 	dispatch(FuncRequest(LFUN_DIALOG_SHOW, "latexlog"));
 }
 
@@ -110,9 +118,12 @@ void GuiErrorList::paramsToDialog()
 
 ErrorList const & GuiErrorList::errorList() const
 {
-	return from_master_ ? 
-		bufferview()->buffer().masterBuffer()->errorList(error_type_)
-		: bufferview()->buffer().errorList(error_type_);
+	if (&bufferview()->buffer() == buf_) {
+		error_list_ = from_master_ ?
+			bufferview()->buffer().masterBuffer()->errorList(error_type_)
+			: bufferview()->buffer().errorList(error_type_);
+	}
+	return error_list_;
 }
 
 
@@ -123,12 +134,12 @@ bool GuiErrorList::initialiseParams(string const & data)
 	if (from_master_)
 		error_type = split(data, '|');
 	error_type_ = error_type;
-	Buffer const * buf = from_master_ ?
+	buf_ = from_master_ ?
 		bufferview()->buffer().masterBuffer()
 		: &bufferview()->buffer();
 	name_ = bformat(_("%1$s Errors (%2$s)"), 
 			        _(guiErrorType(error_type)),
-				    from_utf8(buf->absFileName()));
+				    from_utf8(buf_->absFileName()));
 	paramsToDialog();
 	return true;
 }
@@ -136,6 +147,12 @@ bool GuiErrorList::initialiseParams(string const & data)
 
 bool GuiErrorList::goTo(int item)
 {
+	if (&buffer() != buf_) {
+		if (!theBufferList().isLoaded(buf_))
+			return false;
+		FuncRequest fr(LFUN_BUFFER_SWITCH, buf_->absFileName());
+		dispatch(fr);
+	}
 	ErrorItem const & err = errorList()[item];
 
 	if (err.par_id == -1)
@@ -145,10 +162,9 @@ bool GuiErrorList::goTo(int item)
 		// FIXME: implement
 		return false;
 
-	Buffer const & buf = buffer();
-	DocIterator dit = buf.getParFromID(err.par_id);
+	DocIterator dit = buf_->getParFromID(err.par_id);
 
-	if (dit == doc_iterator_end(&buf)) {
+	if (dit == doc_iterator_end(buf_)) {
         // FIXME: Happens when loading a read-only doc with 
         // unknown layout. Should this be the case?
 		LYXERR0("par id " << err.par_id << " not found");
diff --git a/src/frontends/qt4/GuiErrorList.h b/src/frontends/qt4/GuiErrorList.h
index b36255a150..5ceb9f0181 100644
--- a/src/frontends/qt4/GuiErrorList.h
+++ b/src/frontends/qt4/GuiErrorList.h
@@ -57,6 +57,10 @@ private:
 private:
 	///
 	std::string error_type_;
+	///
+	mutable ErrorList error_list_;
+	///
+	Buffer const * buf_;
 	/// the parent document name
 	docstring name_;
 	///