diff --git a/src/libs/clangsupport/nativefilepath.h b/src/libs/clangsupport/nativefilepath.h
index fefaa9c2057..62234dd6fd4 100644
--- a/src/libs/clangsupport/nativefilepath.h
+++ b/src/libs/clangsupport/nativefilepath.h
@@ -171,7 +171,7 @@ public:
     template<typename String>
     static NativeFilePath fromFilePath(String filePath)
     {
-        Utils::PathString nativePath{filePath.data(), filePath.size()};
+        Utils::PathString nativePath{filePath.data(), size_type(filePath.size())};
 
         if (Utils::HostOsInfo::isWindowsHost())
             nativePath.replace('/', '\\');
diff --git a/src/plugins/coreplugin/fancytabwidget.cpp b/src/plugins/coreplugin/fancytabwidget.cpp
index 6c0def6e3ca..a233b8c58c0 100644
--- a/src/plugins/coreplugin/fancytabwidget.cpp
+++ b/src/plugins/coreplugin/fancytabwidget.cpp
@@ -184,13 +184,13 @@ void FancyTabBar::leaveEvent(QEvent *event)
 QSize FancyTabBar::sizeHint() const
 {
     const QSize sh = tabSizeHint();
-    return {sh.width(), sh.height() * m_tabs.count()};
+    return {sh.width(), sh.height() * int(m_tabs.count())};
 }
 
 QSize FancyTabBar::minimumSizeHint() const
 {
     const QSize sh = tabSizeHint(true);
-    return {sh.width(), sh.height() * m_tabs.count()};
+    return {sh.width(), sh.height() * int(m_tabs.count())};
 }
 
 QRect FancyTabBar::tabRect(int index) const
diff --git a/src/plugins/coreplugin/locator/commandlocator.cpp b/src/plugins/coreplugin/locator/commandlocator.cpp
index f2b83e74e37..c3cc9740a9a 100644
--- a/src/plugins/coreplugin/locator/commandlocator.cpp
+++ b/src/plugins/coreplugin/locator/commandlocator.cpp
@@ -90,7 +90,7 @@ QList<LocatorFilterEntry> CommandLocator::matchesFor(QFutureInterface<LocatorFil
             const int index = text.indexOf(entry, 0, entryCaseSensitivity);
             if (index >= 0) {
                 LocatorFilterEntry filterEntry(this, text, QVariant(i));
-                filterEntry.highlightInfo = {index, entry.length()};
+                filterEntry.highlightInfo = {index, int(entry.length())};
 
                 if (index == 0)
                     betterEntries.append(filterEntry);
diff --git a/src/plugins/coreplugin/locator/executefilter.cpp b/src/plugins/coreplugin/locator/executefilter.cpp
index ea983a34f56..b827b601910 100644
--- a/src/plugins/coreplugin/locator/executefilter.cpp
+++ b/src/plugins/coreplugin/locator/executefilter.cpp
@@ -69,7 +69,7 @@ QList<LocatorFilterEntry> ExecuteFilter::matchesFor(QFutureInterface<LocatorFilt
         LocatorFilterEntry filterEntry(this, cmd, QVariant());
         const int index = cmd.indexOf(entry, 0, entryCaseSensitivity);
         if (index >= 0) {
-            filterEntry.highlightInfo = {index, entry.length()};
+            filterEntry.highlightInfo = {index, int(entry.length())};
             value.append(filterEntry);
         } else {
             others.append(filterEntry);
diff --git a/src/plugins/coreplugin/locator/locatorwidget.cpp b/src/plugins/coreplugin/locator/locatorwidget.cpp
index e545b8313c3..cb2e49e68b0 100644
--- a/src/plugins/coreplugin/locator/locatorwidget.cpp
+++ b/src/plugins/coreplugin/locator/locatorwidget.cpp
@@ -319,8 +319,9 @@ void CenteredLocatorPopup::updateGeometry()
     QTC_ASSERT(parentWidget(), return);
     const QSize size = preferredSize();
     const QSize parentSize = parentWidget()->size();
-    const QPoint pos = parentWidget()->mapToGlobal({(parentSize.width() - size.width()) / 2,
-                                                    parentSize.height() / 2 - size.height()});
+    const QPoint local((parentSize.width() - size.width()) / 2,
+                        parentSize.height() / 2 - size.height());
+    const QPoint pos = parentWidget()->mapToGlobal(local);
     QRect rect(pos, size);
     // invisible widget doesn't have the right screen set yet, so use the parent widget to
     // check for available geometry
diff --git a/src/plugins/coreplugin/locator/urllocatorfilter.cpp b/src/plugins/coreplugin/locator/urllocatorfilter.cpp
index 194a3f620f3..626d820855c 100644
--- a/src/plugins/coreplugin/locator/urllocatorfilter.cpp
+++ b/src/plugins/coreplugin/locator/urllocatorfilter.cpp
@@ -152,7 +152,7 @@ QList<Core::LocatorFilterEntry> UrlLocatorFilter::matchesFor(
             break;
         const QString name = url.arg(entry);
         Core::LocatorFilterEntry filterEntry(this, name, QVariant(), m_icon);
-        filterEntry.highlightInfo = {name.lastIndexOf(entry), entry.length()};
+        filterEntry.highlightInfo = {int(name.lastIndexOf(entry)), int(entry.length())};
         entries.append(filterEntry);
     }
     return entries;
diff --git a/src/plugins/help/helpindexfilter.cpp b/src/plugins/help/helpindexfilter.cpp
index d3d78cf0f70..45d2ba63882 100644
--- a/src/plugins/help/helpindexfilter.cpp
+++ b/src/plugins/help/helpindexfilter.cpp
@@ -202,7 +202,7 @@ QList<LocatorFilterEntry> HelpIndexFilter::matchesFor(QFutureInterface<LocatorFi
     for (const QString &keyword : qAsConst(m_lastIndicesCache)) {
         const int index = keyword.indexOf(entry, 0, cs);
         LocatorFilterEntry filterEntry(this, keyword, QVariant(), m_icon);
-        filterEntry.highlightInfo = {index, entry.length()};
+        filterEntry.highlightInfo = {index, int(entry.length())};
         entries.append(filterEntry);
     }
 
diff --git a/src/plugins/help/helpindexfilter.h b/src/plugins/help/helpindexfilter.h
index 40c19d54a8e..fe454f81f41 100644
--- a/src/plugins/help/helpindexfilter.h
+++ b/src/plugins/help/helpindexfilter.h
@@ -28,6 +28,7 @@
 #include <coreplugin/locator/ilocatorfilter.h>
 
 #include <QIcon>
+#include <QMultiMap>
 #include <QMutex>
 
 namespace Help {
diff --git a/src/plugins/projectexplorer/ioutputparser.cpp b/src/plugins/projectexplorer/ioutputparser.cpp
index 8c6e1c2b331..c03c465f8e0 100644
--- a/src/plugins/projectexplorer/ioutputparser.cpp
+++ b/src/plugins/projectexplorer/ioutputparser.cpp
@@ -108,7 +108,7 @@ void OutputTaskParser::setDetailsFormat(Task &task, const LinkSpecs &linkSpecs)
     task.formats.clear();
     int offset = task.summary.length() + 1;
     for (const Utils::FormattedText &ft : linkifiedText) {
-        task.formats << QTextLayout::FormatRange{offset, ft.text.length(), ft.format};
+        task.formats << QTextLayout::FormatRange{offset, int(ft.text.length()), ft.format};
         offset += ft.text.length();
     }
 }
diff --git a/src/plugins/projectexplorer/jsonwizard/jsonwizardscannergenerator.cpp b/src/plugins/projectexplorer/jsonwizard/jsonwizardscannergenerator.cpp
index ff0fcde7d44..51ffd37b91c 100644
--- a/src/plugins/projectexplorer/jsonwizard/jsonwizardscannergenerator.cpp
+++ b/src/plugins/projectexplorer/jsonwizard/jsonwizardscannergenerator.cpp
@@ -99,7 +99,7 @@ Core::GeneratedFiles JsonWizardScannerGenerator::fileList(Utils::MacroExpander *
 
     result = scan(project.absolutePath(), project);
 
-    static const auto getDepth = [](const QString &filePath) { return filePath.count('/'); };
+    static const auto getDepth = [](const QString &filePath) { return int(filePath.count('/')); };
     int minDepth = std::numeric_limits<int>::max();
     for (auto it = result.begin(); it != result.end(); ++it) {
         const QString relPath = project.relativeFilePath(it->path());
diff --git a/src/plugins/remotelinux/linuxdevice.cpp b/src/plugins/remotelinux/linuxdevice.cpp
index f8ebbf16903..238beb0f460 100644
--- a/src/plugins/remotelinux/linuxdevice.cpp
+++ b/src/plugins/remotelinux/linuxdevice.cpp
@@ -93,7 +93,7 @@ private:
             const QStringList elements = line.split(QLatin1Char('\n'));
             if (elements.count() < 4) {
                 qDebug("%s: Expected four list elements, got %d. Line was '%s'.", Q_FUNC_INFO,
-                       elements.count(), qPrintable(visualizeNull(line)));
+                       int(elements.count()), qPrintable(visualizeNull(line)));
                 continue;
             }
             bool ok;
diff --git a/src/plugins/texteditor/syntaxhighlighter.cpp b/src/plugins/texteditor/syntaxhighlighter.cpp
index bfa0f85a866..2c2c9d0648b 100644
--- a/src/plugins/texteditor/syntaxhighlighter.cpp
+++ b/src/plugins/texteditor/syntaxhighlighter.cpp
@@ -475,7 +475,7 @@ void SyntaxHighlighter::formatSpaces(const QString &text, int start, int count)
 {
     Q_D(const SyntaxHighlighter);
     int offset = start;
-    const int end = std::min(start + count, text.length());
+    const int end = std::min(start + count, int(text.length()));
     while (offset < end) {
         if (text.at(offset).isSpace()) {
             int start = offset++;
@@ -503,7 +503,7 @@ void SyntaxHighlighter::setFormatWithSpaces(const QString &text, int start, int
     QTextCharFormat visualSpaceFormat = d->whitespaceFormat;
     visualSpaceFormat.setBackground(format.background());
 
-    const int end = std::min(start + count, text.length());
+    const int end = std::min(start + count, int(text.length()));
     int index = start;
 
     while (index != end) {
diff --git a/src/plugins/welcome/introductionwidget.cpp b/src/plugins/welcome/introductionwidget.cpp
index 83ee58e277f..0146e4e1982 100644
--- a/src/plugins/welcome/introductionwidget.cpp
+++ b/src/plugins/welcome/introductionwidget.cpp
@@ -284,7 +284,7 @@ void IntroductionWidget::paintEvent(QPaintEvent *)
     p.setOpacity(.87);
     const QColor backgroundColor = Qt::black;
     if (m_stepPointerAnchor) {
-        const QPoint anchorPos = m_stepPointerAnchor->mapTo(parentWidget(), {0, 0});
+        const QPoint anchorPos = m_stepPointerAnchor->mapTo(parentWidget(), QPoint{0, 0});
         const QRect anchorRect(anchorPos, m_stepPointerAnchor->size());
         const QRect spotlightRect = anchorRect.adjusted(-SPOTLIGHTMARGIN,
                                                         -SPOTLIGHTMARGIN,