Don't short circuit visiting else

pkg/analyzer/lib/src/generated/resolver.dart

Index: pkg/analyzer/lib/src/generated/resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index 8f0038abd93fdb634df6c3596d64bb03e0241e69..7dbf6e42c99492dbe9054a776fd77d0869c52b5e 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -3690,7 +3690,9 @@ class ExitDetector extends GeneralizingAstVisitor<bool> {
     if (thenStatement == null || elseStatement == null) {
       return false;
     }
-    return _nodeExits(thenStatement) && _nodeExits(elseStatement);
+    bool thenExits = _nodeExits(thenStatement);
+    bool elseExits = _nodeExits(elseStatement);
+    return thenExits && elseExits;
   }
 
   @override