getInferredValuesList() : protection against null min/max

src/param/param-values.ts

@@ -117,7 +117,11 @@ export class ParamValues implements IterableValues {
     public getInferredValuesList(reverse: boolean = false, extendTo?: number, addLastStep: boolean = false) {
         if ([ ParamValueMode.MINMAX, ParamValueMode.LISTE ].includes(this.valueMode)) {
             // protection against infinite loops
-            if (this.step !== undefined && this.step > 0) {
+            if (
+                this.step !== undefined && this.step > 0
+                && this.min !== undefined && this.min !== null
+                && this.max !== undefined && this.max !== null
+            ) {
                 const it = this.initValuesIterator(reverse, extendTo, addLastStep);
                 const values: number[] = [];
                 for (const v of it) {