diff --git a/src/AspellChecker.cpp b/src/AspellChecker.cpp
index 06da1f8149..c4b2419994 100644
--- a/src/AspellChecker.cpp
+++ b/src/AspellChecker.cpp
@@ -219,7 +219,7 @@ AspellConfig * AspellChecker::Private::getConfig(string const & lang, string con
 	}
 	if (!have_dict) {
 		// check for package data of OS installation
-		have_dict = checkAspellData(config, osPackageBase(), osPackageDataDirectory(), osPackageDictDirectory(), lang, variety);
+		checkAspellData(config, osPackageBase(), osPackageDataDirectory(), osPackageDictDirectory(), lang, variety);
 	}
 	return config ;
 }
diff --git a/src/TextClass.cpp b/src/TextClass.cpp
index 60fab48e6c..17fc266ebd 100644
--- a/src/TextClass.cpp
+++ b/src/TextClass.cpp
@@ -413,8 +413,8 @@ TextClass::ReturnValues TextClass::read(Lexer & lexrc, ReadType rt)
 		}
 
 		// used below to track whether we are in an IfStyle or IfCounter tag.
-		bool ifstyle    = false;
-		bool ifcounter  = false;
+		bool ifstyle   = false;
+		bool ifcounter = false;
 
 		switch (static_cast<TextClassTags>(le)) {
 
@@ -508,9 +508,6 @@ TextClass::ReturnValues TextClass::read(Lexer & lexrc, ReadType rt)
 				Layout lay;
 				readStyle(lexrc, lay);
 			}
-
-			// reset flag
-			ifstyle = false;
 			break;
 		}
 
@@ -764,8 +761,6 @@ TextClass::ReturnValues TextClass::read(Lexer & lexrc, ReadType rt)
 				lexrc.printError("No name given for style: `$$Token'.");
 				error = true;
 			}
-			// reset flag
-			ifcounter = false;
 			break;
 
 		case TC_TITLELATEXTYPE:
diff --git a/src/frontends/qt4/GuiCitation.cpp b/src/frontends/qt4/GuiCitation.cpp
index 483c8fb5b1..052d700b2b 100644
--- a/src/frontends/qt4/GuiCitation.cpp
+++ b/src/frontends/qt4/GuiCitation.cpp
@@ -260,9 +260,6 @@ void GuiCitation::updateStyles(BiblioInfo const & bi)
 		return;
 	}
 
-	if (!selectedLV->selectionModel()->selectedIndexes().empty())
-		curr = selectedLV->selectionModel()->selectedIndexes()[0].row();
-
 	static const size_t max_length = 80;
 	QStringList sty = citationStyles(bi, max_length);
 
diff --git a/src/frontends/qt4/GuiPrefs.cpp b/src/frontends/qt4/GuiPrefs.cpp
index 72e5328a6d..f7c00f45bf 100644
--- a/src/frontends/qt4/GuiPrefs.cpp
+++ b/src/frontends/qt4/GuiPrefs.cpp
@@ -2863,7 +2863,6 @@ QTreeWidgetItem * PrefShortcuts::insertShortcutItem(FuncRequest const & lfun,
 	QString const lfun_name = toqstr(from_utf8(action_name)
 			+ ' ' + lfun.argument());
 	QString const shortcut = toqstr(seq.print(KeySequence::ForGui));
-	KeyMap::ItemType item_tag = tag;
 
 	QTreeWidgetItem * newItem = 0;
 	// for unbind items, try to find an existing item in the system bind list
@@ -2880,7 +2879,6 @@ QTreeWidgetItem * PrefShortcuts::insertShortcutItem(FuncRequest const & lfun,
 		// Such an item is not displayed to avoid confusion (what is
 		// unmatched removed?).
 		if (!newItem) {
-			item_tag = KeyMap::UserExtraUnbind;
 			return 0;
 		}
 	}
@@ -2913,7 +2911,7 @@ QTreeWidgetItem * PrefShortcuts::insertShortcutItem(FuncRequest const & lfun,
 	newItem->setText(1, shortcut);
 	// record BindFile representation to recover KeySequence when needed.
 	newItem->setData(1, Qt::UserRole, toqstr(seq.print(KeySequence::BindFile)));
-	setItemType(newItem, item_tag);
+	setItemType(newItem, tag);
 	return newItem;
 }
 
diff --git a/src/insets/InsetCollapsable.cpp b/src/insets/InsetCollapsable.cpp
index 337845a607..aeac8b3586 100644
--- a/src/insets/InsetCollapsable.cpp
+++ b/src/insets/InsetCollapsable.cpp
@@ -348,7 +348,6 @@ void InsetCollapsable::draw(PainterInfo & pi, int x, int y) const
 			int const ww = max(textdim.wid, w);
 			pi.pain.rectText(x + (ww - w) / 2, y + desc + a,
 				buttonLabel(bv), font, Color_none, Color_none);
-			desc += d;
 		}
 
 		// a visual cue when the cursor is inside the inset
diff --git a/src/insets/InsetExternal.cpp b/src/insets/InsetExternal.cpp
index daa5831107..a62100e9b0 100644
--- a/src/insets/InsetExternal.cpp
+++ b/src/insets/InsetExternal.cpp
@@ -616,10 +616,8 @@ void InsetExternal::setParams(InsetExternalParams const & p)
 		LASSERT(false, return);
 		break;
 	case PREVIEW_INSTANT: {
-		//FIXME: why is the value below immediately forgotten?
-		RenderMonitoredPreview * preview_ptr = renderer_->asMonitoredPreview();
 		renderer_.reset(new RenderMonitoredPreview(this));
-		preview_ptr = renderer_->asMonitoredPreview();
+		RenderMonitoredPreview * preview_ptr = preview_ptr = renderer_->asMonitoredPreview();
 		preview_ptr->fileChanged(bind(&InsetExternal::fileChanged, this));
 		if (preview_ptr->monitoring())
 			preview_ptr->stopMonitoring();
diff --git a/src/insets/InsetTabular.cpp b/src/insets/InsetTabular.cpp
index 6a138cc18d..d92acf2e0f 100644
--- a/src/insets/InsetTabular.cpp
+++ b/src/insets/InsetTabular.cpp
@@ -6231,7 +6231,6 @@ bool InsetTabular::insertPlaintextString(BufferView & bv, docstring const & buf,
 	if (usePaste) {
 		paste_tabular.reset(new Tabular(buffer_, rows, maxCols));
 		loctab = paste_tabular.get();
-		cols = 0;
 		dirtyTabularStack(true);
 	} else {
 		loctab = &tabular;
diff --git a/src/lyxfind.cpp b/src/lyxfind.cpp
index aedbc53bff..0a788c7ba8 100644
--- a/src/lyxfind.cpp
+++ b/src/lyxfind.cpp
@@ -592,7 +592,6 @@ string escape_for_regex(string s, bool match_latex)
 		}
 		if (end_pos == s.size()) {
 			s.replace(new_pos, end_pos - new_pos, t);
-			pos = s.size();
 			LYXERR(Debug::FIND, "Regexp after \\regexp{} removal: " << s);
 			break;
 		}
@@ -1224,12 +1223,10 @@ int findBackwardsAdv(DocIterator & cur, MatchStringAdv & match)
 		return 0;
 	cur.backwardPos();
 	DocIterator cur_orig(cur);
-	bool found_match;
 	bool pit_changed = false;
-	found_match = false;
 	do {
 		cur.pos() = 0;
-		found_match = match(cur, -1, false);
+		bool found_match = match(cur, -1, false);
 
 		if (found_match) {
 			if (pit_changed)