Merge pull request #12630 from grafana/davkal/explore-empty-error

Dont parse empty explore state from url

public/app/containers/Explore/Explore.tsx

@@ -33,7 +33,8 @@ function makeTimeSeriesList(dataList, options) {
   });
   });
 }
 }
 
 
-function parseInitialState(initial) {
+function parseInitialState(initial: string | undefined) {
+  if (initial) {
     try {
     try {
       const parsed = JSON.parse(decodePathComponent(initial));
       const parsed = JSON.parse(decodePathComponent(initial));
       return {
       return {
@@ -43,8 +44,9 @@ function parseInitialState(initial) {
       };
       };
     } catch (e) {
     } catch (e) {
       console.error(e);
       console.error(e);
-    return { queries: [], range: DEFAULT_RANGE };
     }
     }
+  }
+  return { datasource: null, queries: [], range: DEFAULT_RANGE };
 }
 }
 
 
 interface IExploreState {
 interface IExploreState {