diff --git a/src/plugins/mesonprojectmanager/mesoninfoparser/buildoptions.h b/src/plugins/mesonprojectmanager/mesoninfoparser/buildoptions.h
index 74b33b72cc7..f1b1a6eefc7 100644
--- a/src/plugins/mesonprojectmanager/mesoninfoparser/buildoptions.h
+++ b/src/plugins/mesonprojectmanager/mesoninfoparser/buildoptions.h
@@ -249,8 +249,8 @@ protected:
 
 struct UnknownBuildOption : BuildOption
 {
-    QVariant value() const override { return "Unknown option"; }
-    QString valueStr() const override { return "Unknown option"; }
+    QVariant value() const override { return {"Unknown option"}; }
+    QString valueStr() const override { return {"Unknown option"}; }
     void setValue(const QVariant &) override {}
     Type type() const override { return Type::unknown; }
     BuildOption *copy() const override { return new UnknownBuildOption{*this}; }
diff --git a/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.cpp b/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.cpp
index 19b52318183..6cd631d4640 100644
--- a/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.cpp
+++ b/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.cpp
@@ -27,6 +27,19 @@
 #include <projectexplorer/taskhub.h>
 namespace MesonProjectManager {
 namespace Internal {
+
+struct WarningRegex
+{
+    const int lineCnt;
+    const QRegularExpression regex;
+};
+
+static const WarningRegex multiLineWarnings[] = {
+    WarningRegex{ 3, QRegularExpression{R"!(WARNING: Unknown options:)!"}},
+    WarningRegex{ 2, QRegularExpression{
+            R"!(WARNING: Project specifies a minimum meson_version|WARNING: Deprecated features used:)!"}},
+    WarningRegex{ 1, QRegularExpression{R"!(WARNING: )!"}}};
+
 inline void MesonOutputParser::addTask(ProjectExplorer::Task task)
 {
 #ifndef MESONPARSER_DISABLE_TASKS_FOR_TESTS // small hack to allow unit testing without the banana/monkey/jungle
@@ -100,7 +113,7 @@ Utils::OutputLineParser::Result MesonOutputParser::processErrors(const QString &
 
 Utils::OutputLineParser::Result MesonOutputParser::processWarnings(const QString &line)
 {
-    for (const auto &warning : m_multiLineWarnings) {
+    for (const auto &warning : multiLineWarnings) {
         const auto match = warning.regex.match(line);
         if (match.hasMatch()) {
             m_remainingLines = warning.lineCnt;
diff --git a/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.h b/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.h
index 11d6942fb23..49eff4fb64b 100644
--- a/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.h
+++ b/src/plugins/mesonprojectmanager/project/outputparsers/mesonoutputparser.h
@@ -34,20 +34,8 @@ namespace Internal {
 class MesonOutputParser final : public ProjectExplorer::OutputTaskParser
 {
     Q_OBJECT
-    struct WarningRegex
-    {
-        const int lineCnt;
-        const QRegularExpression regex;
-    };
     const QRegularExpression m_errorFileLocRegex{R"((^.*meson.build):(\d+):(\d+): ERROR)"};
     const QRegularExpression m_errorOptionRegex{R"!(ERROR: Value)!"};
-    const std::array<WarningRegex, 3> m_multiLineWarnings{
-        WarningRegex{3, QRegularExpression{R"!(WARNING: Unknown options:)!"}},
-        WarningRegex{
-            2,
-            QRegularExpression{
-                R"!(WARNING: Project specifies a minimum meson_version|WARNING: Deprecated features used:)!"}},
-        WarningRegex{1, QRegularExpression{R"!(WARNING: )!"}}};
     int m_remainingLines = 0;
     QStringList m_pending;
     void pushLine(const QString &line);