Scale::clipped check input

Base/Axis/Scale.cpp

@@ -149,6 +149,8 @@ bool Scale::isScan() const
 
 Scale Scale::clipped(double lower, double upper) const
 {
+    if (lower > upper)
+        throw std::runtime_error("Scale::clipped called with invalid bounds (lower > upper)");
     std::vector<Bin1D> out_bins;
     const bool is_scan = isScan();
     for (const Bin1D& b : m_bins)