fix(axes_objects): check input bounds

Author: alandefreitas

source/matplot/axes_objects/contours.cpp

@@ -586,6 +586,13 @@ namespace matplot {
         }
 
         // if it increases
+        if (Z_data_.size() < n_row + 1 || Z_data_[n_row].size() < n_col + 1 ||
+            Z_data_.size() < opposite_row + 1 ||
+            Z_data_[opposite_row].size() < opposite_col + 1) {
+            // if we are outside the grid, we don't know
+            // if it's lower or upper level
+            return false;
+        }
         bool higher_values_on_left =
             Z_data_[n_row][n_col] > Z_data_[opposite_row][opposite_col];
         if (higher_values_on_left) {

source/matplot/axes_objects/histogram.cpp

@@ -754,7 +754,8 @@ namespace matplot {
     }
 
     class histogram &histogram::edge_color(std::string_view color) {
-        edge_color(to_array(color));
+        auto a = to_array(color);
+        edge_color(a);
         return *this;
     }
 

source/matplot/axes_objects/line.cpp

@@ -194,6 +194,9 @@ namespace matplot {
                     size_t index =
                         only_at_marker_indices ? marker_indices_[i] : i;
 
+                    if (x_is_manual && index >= x_data_.size()) {
+                        break;
+                    }
                     double x_value = x_is_manual ? x_data_[index] : index + 1;
                     if (!std::isfinite(x_value) || !std::isfinite(y_data_[i])) {
                         ss << "    \n";

source/matplot/axes_objects/parallel_lines.cpp

@@ -219,7 +219,7 @@ namespace matplot {
 
             const size_t n_ticks = ticks[dimension].ticks.size();
             constexpr double tick_size = 0.03;
-            for (size_t i = 0; i < n_ticks + 1; ++i) {
+            for (size_t i = 0; i < n_ticks; ++i) {
                 double y = normalize(ticks[dimension].ticks[i], dimension);
                 ss << "    " << dimension + 1 << "  " << y << "\n";
                 const bool is_last_dimension = dimension == data_.size() - 1;