diff --git a/oscar/Graphs/gSessionTimesChart.cpp b/oscar/Graphs/gSessionTimesChart.cpp
index 579614b9..d3a38cf9 100644
--- a/oscar/Graphs/gSessionTimesChart.cpp
+++ b/oscar/Graphs/gSessionTimesChart.cpp
@@ -1142,7 +1142,8 @@ void gAHIChart::customCalc(Day *day, QVector<SummaryChartSlice> &list)
         case 1:
             calc->wavg_sum += value;
             calc->divisor += hours;
-        default:
+            break;
+        case 2:
             calc->avg_sum += value;
             calc->cnt++;
             break;
diff --git a/oscar/SleepLib/common.cpp b/oscar/SleepLib/common.cpp
index 65769d0b..1069ea22 100644
--- a/oscar/SleepLib/common.cpp
+++ b/oscar/SleepLib/common.cpp
@@ -802,7 +802,8 @@ QByteArray gUncompress(const QByteArray & data)
 
         switch (ret) {
         case Z_NEED_DICT:
-            ret = Z_DATA_ERROR;     // and fall through
+            ret = Z_DATA_ERROR;
+            // fall through
         case Z_DATA_ERROR:
         case Z_MEM_ERROR:
             Q_UNUSED(ret)
diff --git a/oscar/daily.cpp b/oscar/daily.cpp
index 480a1a10..0d4cb1ae 100644
--- a/oscar/daily.cpp
+++ b/oscar/daily.cpp
@@ -2350,10 +2350,10 @@ void Daily::updateCube()
 }
 
 
-void Daily::on_toggleGraphs_clicked(bool checked)
+void Daily::on_toggleGraphs_clicked(bool /*checked*/)
 {
     QString s;
-    QIcon *icon=checked ? icon_off : icon_on;
+    //QIcon *icon=checked ? icon_off : icon_on;
     if (ui->graphCombo == nullptr )
         qDebug() << "ToggleGraphs clicked with null graphCombo ptr";
     else
@@ -2414,10 +2414,10 @@ void Daily::on_eventsCombo_activated(int index)
     GraphView->redraw();
 }
 
-void Daily::on_toggleEvents_clicked(bool checked)
+void Daily::on_toggleEvents_clicked(bool /*checked*/)
 {
     QString s;
-    QIcon *icon=checked ? icon_on : icon_off;
+    //QIcon *icon=checked ? icon_on : icon_off;
 
     if (ui->toggleEvents == nullptr )
         qDebug() << "ToggleEvents clicked with null toggleEvents ptr";
diff --git a/oscar/oscar.pro b/oscar/oscar.pro
index a4476e5c..a6410d1f 100644
--- a/oscar/oscar.pro
+++ b/oscar/oscar.pro
@@ -443,8 +443,8 @@ test {
     CONFIG += console debug
     CONFIG -= app_bundle
     !win32 {  # add memory checking on Linux and macOS test builds
-        QMAKE_CFLAGS += -fsanitize=address -fno-omit-frame-pointer -fno-common -fsanitize-address-use-after-scope
-        QMAKE_CXXFLAGS += -fsanitize=address -fno-omit-frame-pointer -fno-common -fsanitize-address-use-after-scope
+        QMAKE_CFLAGS += -Werror -fsanitize=address -fno-omit-frame-pointer -fno-common -fsanitize-address-use-after-scope
+        QMAKE_CXXFLAGS += -Werror -fsanitize=address -fno-omit-frame-pointer -fno-common -fsanitize-address-use-after-scope
         QMAKE_LFLAGS += -fsanitize=address
     }