Fix NRE when no item is selected.

comintern · comintern · commit ac1348340475 · 2019-02-25T21:59:21.000-06:00
diff --git a/Rubberduck.Core/CodeAnalysis/CodeMetrics/CodeMetricsViewModel.cs b/Rubberduck.Core/CodeAnalysis/CodeMetrics/CodeMetricsViewModel.cs
@@ -112,7 +112,7 @@ public ObservableCollection<ICodeMetricResult> Metrics
         {
             get
             {
-                var results = _resultsByDeclaration?.FirstOrDefault(f => ReferenceEquals(f.Key, SelectedItem.Declaration));
+                var results = _resultsByDeclaration?.FirstOrDefault(f => ReferenceEquals(f.Key, SelectedItem?.Declaration));
                 return results?.Value == null ? new ObservableCollection<ICodeMetricResult>() : new ObservableCollection<ICodeMetricResult>(results.Value.Value);
             }
         }

Original file line number	Diff line number	Diff line change
`@@ -112,7 +112,7 @@ public ObservableCollection<ICodeMetricResult> Metrics`
`112`	`112`	`{`
`113`	`113`	`get`
`114`	`114`	`{`
`115`		`- var results = _resultsByDeclaration?.FirstOrDefault(f => ReferenceEquals(f.Key, SelectedItem.Declaration));`
	`115`	`+ var results = _resultsByDeclaration?.FirstOrDefault(f => ReferenceEquals(f.Key, SelectedItem?.Declaration));`
`116`	`116`	`return results?.Value == null ? new ObservableCollection<ICodeMetricResult>() : new ObservableCollection<ICodeMetricResult>(results.Value.Value);`
`117`	`117`	`}`
`118`	`118`	`}`