Added interface and trait

Author: Slamdunk

src/StaticAnalysis/ExecutableLinesFindingVisitor.php

@@ -49,9 +49,11 @@ public function enterNode(Node $node): void
             $node instanceof Node\Stmt\DeclareDeclare ||
             $node instanceof Node\Stmt\Class_ ||
             $node instanceof Node\Stmt\ClassConst ||
+            $node instanceof Node\Stmt\Interface_ ||
             $node instanceof Node\Stmt\Nop ||
             $node instanceof Node\Stmt\Property ||
             $node instanceof Node\Stmt\PropertyProperty ||
+            $node instanceof Node\Stmt\Trait_ ||
             $node instanceof Node\Expr\Variable ||
             $node instanceof Node\Param ||
             $node instanceof Node\Const_ ||
@@ -83,6 +85,7 @@ public function enterNode(Node $node): void
             $node instanceof Node\Expr\Closure
         ) {
             $hasEmptyBody = [] === $node->stmts ||
+                null === $node->stmts ||
                 (
                     1 === count($node->stmts) &&
                     $node->stmts[0] instanceof Node\Stmt\Nop

tests/_files/source_for_branched_exec_lines.php

@@ -441,3 +441,14 @@ public function withCommentsOnly()
          */
     }                                       // +1
 }
+
+interface MyInterface
+{
+    public function myMethod();
+}
+
+trait MyTrait
+{
+    public function myTrait()
+    {}                                      // +1
+}