diff --git a/src/plugins/clangtools/clangtoolrunner.cpp b/src/plugins/clangtools/clangtoolrunner.cpp
index b441ad51f81..dd0cfd41897 100644
--- a/src/plugins/clangtools/clangtoolrunner.cpp
+++ b/src/plugins/clangtools/clangtoolrunner.cpp
@@ -133,7 +133,8 @@ static QString createOutputFilePath(const FilePath &dirPath, const QString &file
 
 bool ClangToolRunner::run()
 {
-    QTC_ASSERT(!m_executable.isEmpty(), return false);
+    QTC_ASSERT(m_executable.isExecutableFile(),
+               qWarning() << "Can't start:" << m_executable << "as" << m_name; return false);
     QTC_CHECK(!m_input.unit.arguments.contains(QLatin1String("-o")));
     QTC_CHECK(!m_input.unit.arguments.contains(m_input.unit.file));
     QTC_ASSERT(FilePath::fromString(m_input.unit.file).exists(), return false);
diff --git a/src/plugins/clangtools/documentclangtoolrunner.cpp b/src/plugins/clangtools/documentclangtoolrunner.cpp
index 3854a71fc69..2d2bd2fb9ef 100644
--- a/src/plugins/clangtools/documentclangtoolrunner.cpp
+++ b/src/plugins/clangtools/documentclangtoolrunner.cpp
@@ -203,7 +203,7 @@ void DocumentClangToolRunner::run()
                         const FilePath executable = toolExecutable(tool);
                         const auto [includeDir, clangVersion]
                             = getClangIncludeDirAndVersion(executable);
-                        if (executable.isEmpty() || includeDir.isEmpty() || clangVersion.isEmpty())
+                        if (!executable.isExecutableFile() || includeDir.isEmpty() || clangVersion.isEmpty())
                             return;
                         const AnalyzeUnit unit(m_fileInfo, includeDir, clangVersion);
                         m_runnerCreators << [this, tool, unit, config, env] {